Development and validation of a semi-quantitative food frequency questionnaire to assess dietary intake in Turkish adults.

To validate the original food frequency questionnaire in Turkish adult population.The cross-sectional study was conducted in June and December 2008 and 2009, and comprised adults of either gender aged 30-70 years. All subjects were Caucasians and were native Turkish speakers. The food frequency questionnaire containing 229 most frequently consumed foods under 7 topics was used for data collection. It was completed twice and the 24-hour dietary...