Development and simulated validation of a food-frequency questionnaire for the Colombian population

Objective To develop a food-frequency questionnaire (FFQ) useful for ranking of nutrient intakes. Design Subjects consuming their regular diet completed 7 days of weighed intake registry (7-WIR). Foods for the FFQ were selected by stepwise multiple regression. The FFQ was then completed for each subject using data on individual food consumption from the 7-WIR. The correlation and agreement between the extrapolated FFQ and the 7-WIR data were...