Effectiveness of a Web-Based Computer-Tailored Multiple-Lifestyle Intervention for People Interested in Reducing their Cardiovascular Risk: A Randomized Controlled Trial

Background Web-based computer-tailored interventions for multiple health behaviors can improve the strength of behavior habits in people who want to reduce their cardiovascular risk. Nonetheless, few randomized controlled trials have tested this assumption to date. Objective The study aim was to test an 8-week Web-based computer-tailored intervention designed to improve habit strength for physical activity and fruit and vegetable consumption among people who want to reduce their cardiovascular risk. In a randomized controlled design, self-reported changes in perceived habit strength, self-efficacy, and planning across different domains of physical activity as well as fruit and vegetable consumption were evaluated. Methods This study was a randomized controlled trial involving an intervention group (n=403) and a waiting control group (n=387). Web-based data collection was performed in Germany and the Netherlands during 2013-2015. The intervention content was based on the Health Action Process Approach and involved personalized feedback on lifestyle behaviors, which indicated whether participants complied with behavioral guidelines for physical activity and fruit and vegetable consumption. There were three Web-based assessments: baseline (T0, N=790), a posttest 8 weeks after the baseline (T1, n=206), and a follow-up 3 months after the baseline (T2, n=121). Data analysis was conducted by analyzing variances and structural equation analysis. Results Significant group by time interactions revealed superior treatment effects for the intervention group, with substantially higher increases in self-reported habit strength for physical activity (F1,199=7.71, P=.006, Cohen’s d=0.37) and fruit and vegetable consumption (F1,199=7.71, P=.006, Cohen’s d=0.30) at posttest T1 for the intervention group. Mediation analyses yielded behavior-specific sequential mediator effects for T1 planning and T1 self-efficacy between the intervention and habit strength at follow-up T2 (fruit and vegetable consumption: beta=0.12, 95% CI 0.09-0.16, P<.001; physical activity: beta=0.04, 95% CI 0.02-0.06, P<.001). Conclusions Our findings indicate the general effectiveness and practicality of Web-based computer-tailored interventions in terms of increasing self-reported habit strength for physical activity and fruit and vegetable consumption. Self-efficacy and planning may play major roles in the mechanisms that facilitate the habit strength of these behaviors; therefore, they should be actively promoted in Web-based interventions. Although the results need to take into account the high dropout rates and medium effect sizes, a large number of people were reached and changes in habit strength were achieved after 3 months. Trial Registration Clinicaltrials.gov NCT01909349; https://clinicaltrials.gov/ct2/show/NCT01909349 (Archived by WebCite at http://www.webcitation.org/6g5F0qoft) and Nederlands Trial Register NTR3706 http://www.trialregister.nl/ trialreg/admin/rctview.asp?TC=3706 (Archived by WebCite at http://www.webcitation.org/6g5F5HMLX)

Mention non-web-based components or important co-interventions in title, if any (e.g., "with telephone support"). 1 2 3 4 5 subitem not at all important essential Does your paper address subitem 1a-ii? Copy and paste relevant sections from manuscript title (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study No.

1a-iii) Primary condition or target group in the title
Mention primary condition or target group in the title, if any (e.g., "for children with Type I Diabetes") Example: A Web-based and Mobile Intervention with Telephone Support for Children with Type I Diabetes: Randomized Controlled Trial 1 2 3 4 5 subitem not at all important essential Does your paper address subitem 1a-iii? * Copy and paste relevant sections from manuscript title (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "(...) people who want to reduce their cardiovascular risk." 1b) ABSTRACT: Structured summary of trial design, methods, results, and conclusions NPT extension: Description of experimental treatment, comparator, care providers, centers, and blinding status.

METHODS section of the ABSTRACT
Mention how participants were recruited (online vs. ofOine), e.g., from an open access website or from a clinic or a closed online user group (closed usergroup trial), and clarify if this was a purely web-based trial, or there were face-to-face components (as part of the intervention or for assessment). Clearly say if outcomes were self-assessed through questionnaires (as common in web-based trials). Note: In traditional ofOine trials, an open trial (open-label trial) is a type of clinical trial in which both the researchers and participants know which treatment is being administered. To avoid confusion, use "blinded" or "unblinded" to indicated the level of blinding instead of "open", as "open" in web-based trials usually refers to "open access" (i.e. participants can self-enrol). (Note: Only report in the abstract what the main paper is reporting. If this information is missing from the main body of text, consider adding it) 1 2 3 4 5 subitem not at all important essential Does your paper address subitem 1b-iii? Copy and paste relevant sections from the manuscript abstract (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "There were three self-report web-based assessments: baseline (T0, N=790), a post-test eight weeks after the baseline (T1, n=206) and a follow-up (T2, n=121) three months after the baseline." 1b-iv) RESULTS section in abstract must contain use data Report number of participants enrolled/assessed in each group, the use/uptake of the intervention (e.g., attrition/adherence metrics, use over time, number of logins etc.), in addition to primary/secondary outcomes. (Note: Only report in the abstract what the main paper is reporting. If this information is missing from the main body of text, consider adding it) 1 2 3 4 5 subitem not at all important essential Does your paper address subitem 1b-iv? Copy and paste relevant sections from the manuscript abstract (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "This study is a randomised controlled trial involving one intervention group (n=403) and a waiting control group (n=387). There were three self-report web-based assessments: baseline (T0, N=790), a post-test eight weeks after the baseline (T1, n=206) and a follow-up (T2, n=121) three months after the baseline."

2a-i) Problem and the type of system/solution
Describe the problem and the type of system/solution that is object of the study: intended as stand-alone intervention vs. incorporated in broader health care program? Intended for a particular patient population? Goals of the intervention, e.g., being more cost-effective to other interventions, replace or complement other solutions? (Note: Details about the intervention are provided in "Methods" under 5) 1 2 3 4 5 subitem not at all important essential Does your paper address subitem 2a-i? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "While these previous computer-tailored web-based studies have focused upon behavioural achievement, the present study extends this topic by directly assessing its ability to enhance habit strength.Testing the mechanisms of how the intervention exhibits an effect on proximal indicators of habit strength is the added value of our research." 2a-ii) Scienti c background, rationale: What is known about the (type of) system Scienti5c background, rationale: What is known about the (type of) system that is the object of the study (be sure to discuss the use of similar systems for other conditions/diagnoses, if appropiate), motivation for the study, i.e. what are the reasons for and what is the context for this speci5c study, from which stakeholder viewpoint is the study performed, potential impact of 5ndings [2]. BrieOy justify the choice of the comparator.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 2a-ii? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "(...) Habituation of the healthy behaviour may be considered the final phase in the health behaviour change chain, whereby the behaviour has stabilised and its strength has plateaued [14]. (...) tailoring intervention content and personal behavioural and action feedback might increase the effectiveness of such programmes in comparison to generic interventions or so-called "one-size-fits-all" approaches [39][40]."

2b) In INTRODUCTION: Speci5c objectives or hypotheses
Does your paper address CONSORT subitem 2b? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Therefore, the first objective of this study is to investigate the effects of an eight-week web-based computer-tailored intervention on improvements of self-reported physical activity habit strength and fruit and vegetable habit strength among people who were motivated to reduce their cardiovascular risk. Moreover, we also test the prediction that social cognitive variables targeted by the tailored intervention (i.e. self-efficacy and planning) increase more from baseline in the intervention group than in the control group. Finally, we investigate whether changes in METHODS 3a) Description of trial design (such as parallel, factorial) including allocation ratio Does your paper address CONSORT subitem 3a? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "This study is a randomised controlled trial involving one intervention group (IG) and one waiting control group (WCG). There were three assessments: baseline (T0, N=790), a post-test at eight weeks after the baseline (T1, n=206) and a follow-up (T2, n=121) three months after the baseline. (...) Randomisation into IG and WCG was undertaken by the content management system TailorBuilder, which is developed for web-based tailored interventions. No block or cluster randomisation was applied; rather, the randomisation was conducted at the individual level.
3b) Important changes to methods after trial commencement (such as eligibility criteria), with reasons Does your paper address CONSORT subitem 3b? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Not applicable, as no changes were made after trial commencement.

3b-i) Bug xes, Downtimes, Content Changes
Bug 5xes, Downtimes, Content Changes: ehealth systems are often dynamic systems. A description of changes to methods therefore also includes important changes made on the intervention or comparator during the trial (e.g., major bug 5xes or changes in the functionality or content) (5-iii) and other "unexpected events" that may have inOuenced study design such as staff changes, system failures/downtimes, etc. [2].
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 3b-i?
CONSORT-EHEALTH (V 1.6.1) -Submission/Publication Form https://docs.google.com/forms/d/1KlxFl4iTrxRIWADX-jCukJwHv4lE5IPjlPdqyWTzJ5o/viewf... indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Not applicable, as no changes were made after trial commencement.

4a) Eligibility criteria for participants
Does your paper address CONSORT subitem 4a? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "(...) being 20 to 85 years old, no contraindications for physical activity and FVC, having an interest in improving physical activity and FVC, sufficient reading and writing skills in the relevant language (German or Dutch), computer literacy and internet access."

4a-i) Computer / Internet literacy
Computer / Internet literacy is often an implicit "de facto" eligibility criterion -this should be explicitly clari5ed.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 4a-i? Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Yes: computer literacy and internet literacy were eligibility criteria in this research.
4a-ii) Open vs. closed, web-based vs. face-to-face assessments: Open vs. closed, web-based vs. face-to-face assessments: Mention how participants were recruited (online vs. ofOine), e.g., from an open access website or from a clinic, and clarify if this was a purely web-based trial, or there were face-to-face components (as part of the intervention or for assessment), i.e., to what degree got the study team to know the participant. In online-only trials, clarify if participants were quasi-anonymous and whether having multiple identities was possible or whether technical or logistical measures (e.g., cookies, email con5rmation, phone calls) were used to detect/prevent these.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 4a-ii? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "We used different recruitment strategies: participants were recruited face-to-face by the authors of this study in ten German and eight Dutch cardiac rehabilitation facilities and heart training groups. The authors of this study had contacted the centres for acquisition and they were willing to participate. In addition, we called for participation via internet platforms on diabetes and cardiovascular diseases, as well as via an email invitation from two research agency online panels in Germany and the Netherlands. No data on how many participants were recruited 4a-iii) Information giving during recruitment Information given during recruitment. Specify how participants were briefed for recruitment and in the informed consent procedures (e.g., publish the informed consent documentation as appendix, see also item X26), as this information may have an effect on user self-selection, user expectation and may also bias results.

Does your paper address subitem 4a-iii?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "The website was also open to the general public and provided broad information on the inclusion criteria and the procedure of the eight-week intervention and the duration of the questionnaires. Participants were made aware of the two-group-design. The information provided was identical for all of the study participants, independent of the recruitment strategy." 4b) Settings and locations where the data were collected Does your paper address CONSORT subitem 4b? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study pls. see subitem 4a-ii

4b-i) Report if outcomes were (self-)assessed through online questionnaires
Clearly report if outcomes were (self-)assessed through online questionnaires (as common in web-based trials) or otherwise.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 4b-i? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "All variables were self-assessed online at baseline (T0) as well as after the eight-week intervention period (T1) and during the three-month follow-up (T2)."

4b-ii) Report how institutional af liations are displayed
Report how institutional af5liations are displayed to potential participants [on ehealth media], as af5liations with prestigious hospitals or universities may affect volunteer rates, use, and reactions with regards to an intervention.(Not a required item -describe only if this may bias results) 1 2 3 4 5 subitem not at all important essential Does your paper address subitem 4b-ii? Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Yes. Institutional affiliations are displayed on material (information material, intervention pages and questionnaire; for an example see the appendix to consort ehealth statement).

5)
The interventions for each group with suf5cient details to allow replication, including how and when they were actually administered

5-i) Mention names, credential, af liations of the developers, sponsors, and owners
Mention names, credential, af5liations of the developers, sponsors, and owners [6] (if authors/evaluators are owners or developer of the software, this needs to be declared in a "ConOict of interest" section or mentioned elsewhere in the manuscript).
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 5-i? Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study All of the authors have contributed to the conception and design of the study, (including the intervention) and the recruitment. Besides, there are no conflicts of interests.

5-ii) Describe the history/development process
Describe the history/development process of the application and previous formative evaluations (e.g., focus groups, usability testing), as these will have an impact on adoption/use rates and help with interpreting results.

Does your paper address subitem 5-ii?
CONSORT-EHEALTH (V 1.6.1) -Submission/Publication Form https://docs.google.com/forms/d/1KlxFl4iTrxRIWADX-jCukJwHv4lE5IPjlPdqyWTzJ5o/viewf... indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study We ran focus groups and extensive pilot tests with the questionnaire material to ensure the usability and technical functionality.

5-iii) Revisions and updating
Revisions and updating. Clearly mention the date and/or version number of the application/intervention (and comparator, if applicable) evaluated, or describe whether the intervention underwent major changes during the evaluation process, or whether the development and/or content was "frozen" during the trial. Describe dynamic components such as news feeds or changing content which may have an impact on the replicability of the intervention (for unexpected events see item 3b).

2 3 4 5
subitem not at all important essential

Does your paper address subitem 5-iii?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study No changes were required and made.

5-iv) Quality assurance methods
Provide information on quality assurance methods to ensure accuracy and quality of information provided [1], if applicable.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 5-iv? Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Quality was assured by standardized recruitment protocol and computer-based intervention material.

5-v)
Ensure replicability by publishing the source code, and/or providing screenshots/screencapture video, and/or providing =owcharts of the algorithms used Ensure replicability by publishing the source code, and/or providing screenshots/screen-capture video, and/or providing Oowcharts of the algorithms used. Replicability (i.e., other researchers should in principle be able to replicate the study) is a hallmark of scienti5c reporting.

Does your paper address subitem 5-v?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study The screenshots are available on request -in their original form in German or Dutch.

5-vi) Digital preservation
Digital preservation: Provide the URL of the application, but as the intervention is likely to change or disappear over the course of the years; also make sure the intervention is archived (Internet Archive, webcitation.org, and/or publishing the source code or screenshots/videos alongside the article). As pages behind login screens cannot be archived, consider creating demo pages which are accessible without login.

Does your paper address subitem 5-vi?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study The screenshots are available on request -in their original form in German or Dutch.

5-vii) Access
Access: Describe how participants accessed the application, in what setting/context, if they had to pay (or were paid) or not, whether they had to be a member of speci5c group. If known, describe how participants obtained "access to the platform and Internet" [1]. To ensure access for editors/reviewers /readers, consider to provide a "backdoor" login account or demo mode for reviewers/readers to explore the application (also important for archiving purposes, see vi).
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 5-vii? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study The study participants did not have to pay to get access to intervention material and they used their personal computer (as this was one of the inclusion criteria). The intervention was accessible via the internet. Study participants were provided with the website URL by the trained research assistants to register. Intervention material is available on request. subitem not at all important essential Does your paper address subitem 5-viii? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "(...) the eight-week intervention was delivered to the intervention group (IG) via the internet, (...). We used the Health Action Process Approach as a theoretical framework to develop the eight-week web-based intervention [21,58]. The eight weekly sessions in the intervention period targeted the concepts of the different stages (non-intender, intender and actor) via the use of behaviour change techniques such as providing information about behavioural risk, the benefits of behaviour change, intention formation, barrier identification, prompting specific goal setting

5-ix) Describe use parameters
Describe use parameters (e.g., intended "doses" and optimal timing for use). Clarify what instructions or recommendations were given to the user, e.g., regarding timing, frequency, heaviness of use, if any, or was the intervention used ad libitum.

Does your paper address subitem 5-ix?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study All interventions were used in this predefined format in terms of stagetailoring. "Once a week, the study participants were reminded to participate in the weekly intervention sessions and the follow-up measurements by automatically generated emails containing a link to the respective questionnaire."

5-x) Clarify the level of human involvement
Clarify the level of human involvement (care providers or health professionals, also technical assistance) in the e-intervention or as co-intervention (detail number and expertise of professionals involved, if any, as well as "type of assistance offered, the timing and frequency of the support, how it is initiated, and the medium by which the assistance is delivered". It may be necessary to distinguish between the level of human involvement required for the trial, and the level of human involvement required for a routine application outside of a RCT setting (discuss under item 21 -generalizability).
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 5-x? Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study pls. see 4a-ii

5-xi) Report any prompts/reminders used
Report any prompts/reminders used: Clarify if there were prompts (letters, emails, phone calls, SMS) to use the application, what triggered them, frequency etc. It may be necessary to distinguish between the level of prompts/reminders required for the trial, and the level of prompts/reminders for a routine application outside of a RCT setting (discuss under item 21 -generalizability).
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 5-xi? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Once a week, the study participants were reminded to participate in the weekly intervention sessions and the follow-up measurements by automatically generated emails containing a link to the respective questionnaire."

5-xii) Describe any co-interventions (incl. training/support)
Describe any co-interventions (incl. training/support): Clearly state any interventions that are provided in addition to the targeted eHealth intervention, as ehealth intervention may not be designed as stand-alone intervention. This includes training sessions and support [1]. It may be necessary to distinguish between the level of training required for the trial, and the level of training for a routine application outside of a RCT setting (discuss under item 21 -generalizability.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 5-xii? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study No co-interventions existed.
6a) Completely de5ned pre-speci5ed primary and secondary outcome measures, including how and when they were assessed Does your paper address CONSORT subitem 6a? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "All variables were self-assessed online at baseline (T0) as well as after the eight-week intervention period (T1) and during the three-month follow-up (T2). Study participants indicated all social cognitive items on Likert scales ranging from "not true (1)" to "exactly true (7)"." primary outcomes: habit strength, secondary outcomes: self-efficacy, planning.
6a-i) Online questionnaires: describe if they were validated for online use and apply CHERRIES items to describe how the questionnaires were designed/deployed If outcomes were obtained through online questionnaires, describe if they were validated for online use and apply CHERRIES items to describe how the questionnaires were designed/deployed [9].

Does your paper address subitem 6a-i? Copy and paste relevant sections from manuscript text
Items were validated for online use in a pilot study. The CHERRIES checklist can be found in the appendix.
6a-ii) Describe whether and how "use" (including intensity of use/dosage) was de ned/measured /monitored Describe whether and how "use" (including intensity of use/dosage) was de5ned/measured/monitored (logins, log5le analysis, etc.). Use/adoption metrics are important process outcomes that should be reported in any ehealth trial. 6b) Any changes to trial outcomes after the trial commenced, with reasons Does your paper address CONSORT subitem 6b? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Not applicable, as no changes were made.
7a) How sample size was determined NPT: When applicable, details of whether and how the clustering by care provides or centers was addressed 7a-i) Describe whether and how expected attrition was taken into account when calculating the sample size Describe whether and how expected attrition was taken into account when calculating the sample size.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 7a-i? Copy and paste relevant sections from manuscript title (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study A power calculation showed that n=132 study participants were needed in each condition in each country to be able to detect a small to medium effect. This means that the required total sample size will need to consist of 628 participants, not adjusted for potential drop out during the intervention.

7b) When applicable, explanation of any interim analyses and stopping guidelines
Does your paper address CONSORT subitem 7b? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study We did not run any interim analyses and neither the rehabilitation centers, nor the research agency, nor anyone from the research group requested the need to stop.
8a) Method used to generate the random allocation sequence NPT: When applicable, how care providers were allocated to each trial group Does your paper address CONSORT subitem 8a? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "This study is a randomised controlled trial involving one intervention group (n=403) and a waiting control group (n=387). (...) Randomisation into IG and WCG was undertaken by the content management system TailorBuilder, which is developed for web-based tailored interventions." 8b) Type of randomisation; details of any restriction (such as blocking and block size) Does your paper address CONSORT subitem 8b? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "No block or cluster randomisation was applied; rather, the randomisation was conducted at the individual level." 9) Mechanism used to implement the random allocation sequence (such as sequentially numbered containers), describing any steps taken to conceal the sequence until interventions were assigned Does your paper address CONSORT subitem 9? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Allocation was applied per computer algorithm, just prior to star of intervention. Thus, concealing was not necessary.
10) Who generated the random allocation sequence, who enrolled participants, and who assigned participants to interventions Does your paper address CONSORT subitem 10? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Allocation was applied per computer algorithm, just prior to star of intervention. Thus, concealing was not necessary.
11a) If done, who was blinded after assignment to interventions (for example, participants, care providers, those assessing outcomes) and how NPT: Whether or not administering co-interventions were blinded to group assignment 11a-i) Specify who was blinded, and who wasn't Specify who was blinded, and who wasn't. Usually, in web-based trials it is not possible to blind the participants [1, 3] (this should be clearly acknowledged), but it may be possible to blind outcome assessors, those doing data analysis or those administering co-interventions (if any).
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 11a-i? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Participants and research assistants were blinded to their allocation for the duration of the study."

11a-ii) Discuss e.g., whether participants knew which intervention was the "intervention of interest" and which one was the "comparator"
Informed consent procedures (4a-ii) can create biases and certain expectations -discuss e.g., whether participants knew which intervention was the "intervention of interest" and which one was the "comparator".

Does your paper address subitem 11a-ii?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Participants and research assistants were blinded to their allocation for the duration of the study."

11b) If relevant, description of the similarity of interventions
(this item is usually not relevant for ehealth trials as it refers to similarity of a placebo or sham intervention to a active medication/intervention) Does your paper address CONSORT subitem 11b? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "The WCG obtained access to the eight-week web-based computertailored intervention at T2, after the IG had finished the intervention." 12a) Statistical methods used to compare groups for primary and secondary outcomes NPT: When applicable, details of whether and how the clustering by care providers or centers was addressed Does your paper address CONSORT subitem 12a? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Data analysis was conducted with SPSS 22 using ANOVAS and ANCOVAS with repeated measurements. "The mediation analyses were performed using SPSS AMOS mediation models according to Preacher and Hayes [67]. The bootstrapping approach (5,000 bootstrap samples) was used to estimate 95% confidence intervals of the standardised effects of the intervention on habit strength through self-efficacy and planning."

12a-i) Imputation techniques to deal with attrition / missing values
Imputation techniques to deal with attrition / missing values: Not all participants will use the intervention/comparator as intended and attrition is typically high in ehealth trials. Specify how participants who did not use the application or dropped out from the trial were treated in the statistical analysis (a complete case analysis is strongly discouraged, and simple imputation techniques such as LOCF may also be problematic [4]).
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 12a-i? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Missing study variables were thus estimated with the full information maximum likelihood (FIML) method. We exported the estimated data to SPSS to perform analyses on them. FIML is based upon the maximum likelihood (ML) algorithm and compared with other options (i.e. list-/pair-wise deletion, regression imputation), ML estimates will exhibit the least bias [68]." 12b) Methods for additional analyses, such as subgroup analyses and adjusted analyses Does your paper address CONSORT subitem 12b? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "T-tests revealed small yet significant differences between German (n=371) and Dutch participants (n=419)  subitem not at all important essential

Does your paper address subitem X26-i?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "The study received ethical approval by the Deutsche Gesellschaft für Psychologie in Germany (EK-A-SL022013) and the Medical Ethics Committee of Atrium Medical Centre Heerlen in the Netherlands (12-N-124)."

x26-ii) Outline informed consent procedures
Outline informed consent procedures e.g., if consent was obtained ofOine or online (how? Checkbox, etc.?), and what information was provided (see 4a-ii). See [6] for some items to be included in informed consent documents.

Does your paper address subitem X26-ii?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Participants were made aware of the two-group-design. The information provided was identical for all of the study participants, independent of the recruitment strategy." Participants provided informed consent online and had the opportunity to save and to print all forms.

X26-iii) Safety and security procedures
Safety and security procedures, incl. privacy considerations, and any steps taken to reduce the likelihood or detection of harm (e.g., education and training, availability of a hotline) 1 2 3 4 5 subitem not at all important essential

Does your paper address subitem X26-iii?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Does not apply.

RESULTS
13a) For each group, the numbers of participants who were randomly assigned, received intended treatment, and were analysed for the primary outcome NPT: The number of care providers or centers performing the intervention in each group and the number of patients treated by each care provider in each center Does your paper address CONSORT subitem 13a? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study intervention group (T0: n=403, T1: n=74, T2: N=71); waiting control group (T0: n=387, T1: n=132, T2: n=50) 13b) For each group, losses and exclusions after randomisation, together with reasons Does your paper address CONSORT subitem 13b? (NOTE: Preferably, this is shown in a CONSORT =ow diagram) * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Overall, T0-T1 attrition was 73.9% and T0-T2 attrition was 85.3%." N=337 participants of in the waiting control group discontinued participation and n=332 participants in the intervention group discontinued participation. No reasons for discontinuation were given.

13b-i) Attrition diagram
Strongly recommended: An attrition diagram (e.g., proportion of participants still logging in or using the intervention/comparator in each group plotted over time, similar to a survival curve) or other 5gures or tables demonstrating usage/dose/engagement. 1 2 3 4 5 subitem not at all important essential

Does your paper address subitem 13b-i?
Copy and paste relevant sections from the manuscript or cite the 5gure number if applicable (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study pls. see 13-b. An attrition diagram is available upon request.
14a) Dates de5ning the periods of recruitment and follow-up Does your paper address CONSORT subitem 14a? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Enrollment and follow-up took place from July 2014 until February 2015 in Germany and the Netherlands." 14a-i) Indicate if critical "secular events" fell into the study period Indicate if critical "secular events" fell into the study period, e.g., signi5cant changes in Internet resources available or "changes in computer hardware or Internet delivery resources" 1 2 3 4 5 subitem not at all important essential Does your paper address subitem 14a-i? Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Does not apply, no secular events.
14b) Why the trial ended or was stopped (early) Does your paper address CONSORT subitem 14b? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Trial ended after previously defined recruitment period.

15) A table showing baseline demographic and clinical characteristics for each group
NPT: When applicable, a description of care providers (case volume, quali5cation, expertise, etc.) and centers (volume) in each group Does your paper address CONSORT subitem 15? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "The final sample comprised 790 people with a mean age of 50.9 years at baseline (SD 12.2, Range 20-84). 62.9% (n=497) of the participants were female. 71.8% (n=646) of the participants were married or in a relationship and n=569 participants (72.0%) were employed either full-or part-time. (...) Table 1 provides an overview of the means, frequencies, standard deviations, range and correlations of the main variables in the present study."

15-i) Report demographics associated with digital divide issues
In ehealth trials it is particularly important to report demographics associated with digital divide issues, such as age, education, gender, social-economic status, computer/Internet/ehealth literacy of the participants, if known.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 15-i? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study No, not applicable 16) For each group, number of participants (denominator) included in each analysis and whether the analysis was by original assigned groups 16-i) Report multiple "denominators" and provide de nitions Report multiple "denominators" and provide de5nitions: Report N's (and effect sizes) "across a range of study participation [and use] thresholds" [1], e.g., N exposed, N consented, N used more than x times, N used more than y weeks, N participants "used" the intervention/comparator at speci5c pre-de5ned time points of interest (in absolute and relative numbers per group). Always clearly de5ne "use" of the intervention.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 16-i? * CONSORT-EHEALTH (V 1.6.1) -Submission/Publication Form https://docs.google.com/forms/d/1KlxFl4iTrxRIWADX-jCukJwHv4lE5IPjlPdqyWTzJ5o/viewf... indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study The n=790 study participants taking part in T1 and T2 were retained in all analyses by employing missing imputation methods. Thus even if people did not answer all question, they were included into all analyses.

16-ii) Primary analysis should be intent-to-treat
Primary analysis should be intent-to-treat, secondary analyses could include comparing only "users", with the appropriate caveats that this is no longer a randomized sample (see 18-i).

Does your paper address subitem 16-ii?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Across the sixteen variables used in the analyses, the missing data proportions can be reported with <21% at T0, <19% at T1 and <17% at T2. Missing study variables were thus estimated with the full information maximum likelihood (FIML) method." 17a) For each primary and secondary outcome, results for each group, and the estimated effect size and its precision (such as 95% con5dence interval) Does your paper address CONSORT subitem 17a? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Effect sizes (ES) for differences in means are presented as Cohen's d. Those ES below 0.30 were considered small, whereas those between 0.30 and 0.80 were considered medium and those larger than 0.80 were regarded as large [66]. (...) The bootstrapping approach (5,000 bootstrap samples) was used to estimate 95% confidence intervals of the standardised effects of the intervention on habit strength through self-efficacy and planning."

17a-i) Presentation of process outcomes such as metrics of use and intensity of use
In addition to primary/secondary (clinical) outcomes, the presentation of process outcomes such as metrics of use and intensity of use (dose, exposure) and their operational de5nitions is critical. This does not only refer to metrics of attrition (13-b) (often a binary variable), but also to more continuous exposure metrics such as "average session length". These must be accompanied by a technical description how a metric like a "session" is de5ned (e.g., timeout after idle time) [1] (report under item 6a).

Does your paper address subitem 17a-i?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Not accessed.
17b) For binary outcomes, presentation of both absolute and relative effect sizes is recommended Does your paper address CONSORT subitem 17b? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Not accessed.
18) Results of any other analyses performed, including subgroup analyses and adjusted analyses, distinguishing pre-speci5ed from exploratory Does your paper address CONSORT subitem 18? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Does not apply.

18-i) Subgroup analysis of comparing only users
A subgroup analysis of comparing only users is not uncommon in ehealth trials, but if done, it must be stressed that this is a self-selected sample and no longer an unbiased sample from a randomized trial (see 16-iii).
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 18-i? Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Age, gender, country, employment status, marital status, highest level of education and BMI were included as covariates in all analyses, because at this point we were not interested in sub-group differences."

19) All important harms or unintended effects in each group
(for speci5c guidance see CONSORT for harms) Does your paper address CONSORT subitem 19? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Neither harms nor unintended effects occurred.

19-i) Include privacy breaches, technical problems
Include privacy breaches, technical problems. This does not only include physical "harm" to participants, but also incidents such as perceived or real privacy breaches [1], technical problems, and other unexpected/unintended incidents. "Unintended effects" also includes unintended positive effects [2].

Does your paper address subitem 19-i?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Did not happen.

19-ii) Include qualitative feedback from participants or observations from staff/researchers
Include qualitative feedback from participants or observations from staff/researchers, if available, on strengths and shortcomings of the application, especially if they point to unintended/unexpected effects or uses. This includes (if available) reasons for why people did or did not use the application as intended by the developers.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 19-ii? Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study One Participant suggested opportunity for specifying more action plans.

22)
Interpretation consistent with results, balancing bene5ts and harms, and considering other relevant evidence NPT: In addition, take into account the choice of the comparator, lack of or partial blinding, and unequal expertise of care providers or centers in each group

22-i) Restate study questions and summarize the answers suggested by the data, starting with primary outcomes and process outcomes (use)
Restate study questions and summarize the answers suggested by the data, starting with primary outcomes and process outcomes (use).
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 22-i? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "The intervention led to significant increases in participants' self-reported PA habit strength as well as fruit and vegetable habit strength eight weeks after the baseline. (...) We could show that the intervention successfully addressed two key intervention variables, self-efficacy and planning, which subsequently mediated the intervention effect on habit strength three months after the baseline: in other words, changes in self-efficacy and planning contributed additively to habit strength."

22-ii) Highlight unanswered new questions, suggest future research
Highlight unanswered new questions, suggest future research. subitem not at all important essential

Does your paper address subitem 22-ii?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study "Future studies may include additional items of the SRHI to capture further facets of habitual automaticity (e.g. lack of control).

20-i) Typical limitations in ehealth trials
Typical limitations in ehealth trials: Participants in ehealth trials are rarely blinded. Ehealth trials often look at a multiplicity of outcomes, increasing risk for a Type I error. Discuss biases due to non-use of the intervention/usability issues, biases through informed consent procedures, unexpected events.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem 20-i? * Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study self-report for habit strength, high dropout rate, baseline differences between German and Dutch participants, see also 22-ii.
21) Generalisability (external validity, applicability) of the trial 5ndings NPT: External validity of the trial 5ndings according to the intervention, comparators, patients, and care providers or centers involved in the trial

21-i) Generalizability to other populations
Generalizability to other populations: In particular, discuss generalizability to a general Internet population, outside of a RCT setting, and general patient population, including applicability of the study results for other organizations 1 2 3 4 5 subitem not at all important essential Does your paper address subitem 21-i? Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Generalization is limited to samples with similar demographic and clinical structure.

21-ii) Discuss if there were elements in the RCT that would be different in a routine application setting
Discuss if there were elements in the RCT that would be different in a routine application setting (e.g., prompts/reminders, more human involvement, training sessions or other co-interventions) and what impact the omission of these elements could have on use, adoption, or outcomes if the intervention is applied outside of a RCT setting.

Does your paper address subitem 21-ii?
Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Recruitment strategies might have had additional affects on outcomes, however, equally in all intervention conditions. "This research was funded by the Wilhelm-Stiftung für Rehabilitationsforschung within the Donors' Association for the Promotion of Humanities and Sciences in Germany."

X27-i) State the relation of the study team towards the system being evaluated
In addition to the usual declaration of interests (5nancial or otherwise), also state the relation of the study team towards the system being evaluated, i.e., state if the authors/evaluators are distinct from or identical with the developers/sponsors of the intervention.
1 2 3 4 5 subitem not at all important essential Does your paper address subitem X27-i? Copy and paste relevant sections from the manuscript (include quotes in quotation marks "like this" to indicate direct quotes from your manuscript), or elaborate on this item by providing additional information not in the ms, or brieOy explain why the item is not applicable/relevant for your study Some (not all) of the authors have contributed (together with other researchers) to the development of the non-commercial intervention. However, no conflict of interest was identified.

About the CONSORT EHEALTH checklist
As a result of using this checklist, did you make changes in your manuscript? * yes, major changes yes, minor changes no What were the most important changes you made as a result of using this checklist?
How much time did you spend on going through the checklist INCLUDING making changes in your manuscript * 3h As a result of using this checklist, do you think your manuscript has improved? * yes no Sonstiges:

Would you like to become involved in the CONSORT EHEALTH group?
This would involve for example becoming involved in participating in a workshop and writing an "Explanation and Elaboration" document yes no Sonstiges:

Any other comments or questions on CONSORT EHEALTH
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