Development and testing of a quantitative food frequency questionnaire for use in Kerala, India

To develop and test a food frequency questionnaire (FFQ) for use in rural areas of Kerala, India.Based on food use and market surveys of the study area, a quantitative 81-item interviewer-administered FFQ was developed. A validation study was conducted consisting of 24-h diet recalls (24HR) administered on 8 days randomly selected over an entire year and two administrations of the FFQ, one at the beginning of the 1-year period and the other at...