%0 Journal Article
%@ 14388871
%I JMIR Publications Inc.
%V 16
%N 2
%P e59
%T Relative Validity of Micronutrient and Fiber Intake Assessed With Two New Interactive Meal- and Web-Based Food Frequency Questionnaires
%A Christensen,Sara E
%A Möller,Elisabeth
%A Bonn,Stephanie E
%A Ploner,Alexander
%A Bälter,Olle
%A Lissner,Lauren
%A Bälter,Katarina
%+ Karolinska Institutet, Department of Medical Epidemiology and Biostatistics, Nobels väg 12a, Stockholm, SE-171 77, Sweden, 46 8 52482361, sara.christensen@ki.se
%K validity
%K reproducibility
%K FFQ
%K micronutrients
%K weighed food record
%K Internet
%K adult
%D 2014
%7 21.02.2014
%9 Original Paper
%J J Med Internet Res
%G English
%X Background: The meal- and Web-based food frequency questionnaires, Meal-Q and MiniMeal-Q, were developed for cost-efficient assessment of dietary intake in epidemiological studies. Objective: The objective of this study was to evaluate the relative validity of micronutrient and fiber intake assessed with Meal-Q and MiniMeal-Q. The reproducibility of Meal-Q was also evaluated. Methods: A total of 163 volunteer men and women aged between 20 and 63 years were recruited from Stockholm County, Sweden. Assessment of micronutrient and fiber intake with the 174-item Meal-Q was compared to a Web-based 7-day weighed food record (WFR). Two administered Meal-Q questionnaires were compared for reproducibility. The 126-item MiniMeal-Q, developed after the validation study, was evaluated in a simulated validation by using truncated Meal-Q data. Results: The study population consisted of approximately 80% women (129/163) with a mean age of 33 years (SD 12) who were highly educated (130/163, 80% with >12 years of education) on average. Cross-classification of quartiles with the WFR placed 69% to 90% in the same/adjacent quartile for Meal-Q and 67% to 89% for MiniMeal-Q. Bland-Altman plots with the WFR and the questionnaires showed large variances and a trend of increasing underestimation with increasing intakes. Deattenuated and energy-adjusted Spearman rank correlations between the questionnaires and the WFR were in the range ρ=.25-.69, excluding sodium that was not statistically significant. Cross-classifications of quartiles of the 2 Meal-Q administrations placed 86% to 97% in the same/adjacent quartile. Intraclass correlation coefficients for energy-adjusted intakes were in the range of .50-.76. Conclusions: With the exception of sodium, this validation study demonstrates Meal-Q and MiniMeal-Q to be useful methods for ranking micronutrient and fiber intake in epidemiological studies with Web-based data collection. 
%M 24565605
%R 10.2196/jmir.2965
%U http://www.jmir.org/2014/2/e59/
%U https://doi.org/10.2196/jmir.2965
%U http://www.ncbi.nlm.nih.gov/pubmed/24565605