Development, validity, and reliability of a food frequency questionnaire for antioxidants in elderly Iranian people.

ABSTRACT:

Background

The food frequency questionnaire (FFQ), as a way to assess the dietary intake in comparison with other methods, is easier to analyze and takes less time and is less costly. Our aim in this study was to develop and validate an FFQ for estimating the intakes of selected antioxidants in elderly Iranian people.

Materials and methods

A total of 185 elderly people were randomly selected. Three-day food records were completed by the subjects and collected every 2 months and dietary intake levels of zinc, selenium, carotenes and vitamins C and E were estimated. Based on the food records data, geographic location, and age, an FFQ was designed to estimate antioxidant intakes during 1 year. In addition, for controlling energy intake, 2-day food records were also collected wi

SUBMITTER: Malekahmadi M 

PROVIDER: S-EPMC5122246 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature