FFQ Validation

Validation of the AHS-2 food frequency questionnaire has been accomplished through the use of calibration sub-study in which 24-hr dietary recalls were obtained. Two approaches were used to assess the validity of the questionnaire:
- cross-classification by quartile
- de-attenuated correlation coefficients

A detailed discussion of these validation techniques is available in:

Jaceldo-Siegl, Karen; Fan, Jing; Sabaté, Joan; Knutsen, Synnove F; Haddad, Ella; Beeson, W Lawrence; Herring, R Patti; Butler, Terrence L; Bennett, Hannelore; Fraser, Gary E. Race-specific validation of food intake obtained from a comprehensive FFQ: the Adventist Health Study-2. Public health nutrition. 2011; 14:1988-97
Pubmed ID: 10.1017/S1368980011000735