TY  - JOUR
AU  - Christensen, Sara E
AU  - Möller, Elisabeth
AU  - Bonn, Stephanie E
AU  - Ploner, Alexander
AU  - Bälter, Olle
AU  - Lissner, Lauren
AU  - Bälter, Katarina
PY  - 2014
DA  - 2014/02/21
TI  - Relative Validity of Micronutrient and Fiber Intake Assessed With Two New Interactive Meal- and Web-Based Food Frequency Questionnaires
JO  - J Med Internet Res
SP  - e59
VL  - 16
IS  - 2
KW  - validity
KW  - reproducibility
KW  - FFQ
KW  - micronutrients
KW  - weighed food record
KW  - Internet
KW  - adult
AB  - 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. 
SN  - 14388871
UR  - http://www.jmir.org/2014/2/e59/
UR  - https://doi.org/10.2196/jmir.2965
UR  - http://www.ncbi.nlm.nih.gov/pubmed/24565605
DO  - 10.2196/jmir.2965
ID  - info:doi/10.2196/jmir.2965
ER  -