Assessing validity of a short food frequency questionnaire on present dietary intake of elderly Icelanders.

ABSTRACT:

Background

Few studies exist on the validity of food frequency questionnaires (FFQs) administered to elderly people. The aim of this study was to assess the validity of a short FFQ on present dietary intake, developed specially for the AGES-Reykjavik Study, which includes 5,764 elderly individuals. Assessing the validity of FFQs is essential before they are used in studies on diet-related disease risk and health outcomes.

Method

128 healthy elderly participants (74 y ± 5.7; 58.6% female) answered the AGES-FFQ, and subsequently filled out a 3-day weighed food record. Validity of the AGES-FFQ was assessed by comparing its answers to the dietary data obtained from the weighed food records, using Spearman's rank correlation, Chi-Square/Kendall's tau, and a Jonckheere-Terpstra te

SUBMITTER: Eysteinsdottir T 

PROVIDER: S-EPMC3349496 | biostudies-literature | 2012 Mar

REPOSITORIES: biostudies-literature