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The authors of the paper “Online Alcohol Assessment and Feedback for Hazardous and Harmful Drinkers: Findings From the AMADEUS-2 Randomized Controlled Trial of Routine Practice in Swedish Universities” (J Med Internet Res 2015;17(7):e170) used the wrong variable for the number of email reminders before participants answered the follow-up. In
Comparison of groups at follow-up (total n=931 without University of Gävle).
Number of follow-up emails before response, n (%) | Intervention (n=402) | Control (n=529) |
|
1 | 222 (55.2) | 315 (59.6) | .07 a |
2 | 82 (20.4) | 103 (19.5) |
|
3 | 51 (12.7) | 70 (13.2) |
|
4 | 27 (6.7) | 23 (4.3) |
|
5 | 20 (5.0) | 18 (3.4) |
|
aTrend test.