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Online Dietary Intake Estimation: Reproducibility and Validity of the Food4Me Food Frequency Questionnaire Against a 4-Day Weighed Food Record

Online Dietary Intake Estimation: Reproducibility and Validity of the Food4Me Food Frequency Questionnaire Against a 4-Day Weighed Food Record

Reproducibility study Bland-Altman plots for (a) energy, (b) total fat, (c) protein, and (d) carbohydrate with the mean difference and limits of agreement. The solid line represents the mean difference and the dotted lines represent the limits of agreement. To assess differences in food group intake between repeated administrations of the online Food4 Me FFQ, food items were categorized into 35 food groups.

Rosalind Fallaize, Hannah Forster, Anna L Macready, Marianne C Walsh, John C Mathers, Lorraine Brennan, Eileen R Gibney, Michael J Gibney, Julie A Lovegrove

J Med Internet Res 2014;16(8):e190

Online Dietary Intake Estimation: The Food4Me Food Frequency Questionnaire

Online Dietary Intake Estimation: The Food4Me Food Frequency Questionnaire

The study received approval from the ethical committees at both universities and was carried out between March and October 2012 (LS-11-118-Gibney-Walsh and 01/12-Lovegrove respectively). Participants (n=177) aged ≥18yrs were recruited at both centers. Participants were provided with an information sheet explaining the study, signed a consent form, and completed a brief screening questionnaire either in person or by post. Weight and height were self-reported.

Hannah Forster, Rosalind Fallaize, Caroline Gallagher, Clare B O’Donovan, Clara Woolhead, Marianne C Walsh, Anna L Macready, Julie A Lovegrove, John C Mathers, Michael J Gibney, Lorraine Brennan, Eileen R Gibney

J Med Internet Res 2014;16(6):e150