Evaluation of a web-based, pictorial diet history questionnaire.

  title={Evaluation of a web-based, pictorial diet history questionnaire.},
  author={Jeannette M. Beasley and Amanda Davis and William T. Riley},
  journal={Public health nutrition},
  volume={12 5},
OBJECTIVE To develop and evaluate a pictorial, web-based version of the NCI diet history questionnaire (Web-PDHQ). DESIGN The Web-PDHQ and paper version of the DHQ (Paper-DHQ) were administered 4 weeks apart with 218 participants randomised to order. Dietary data from the Web-PDHQ and Paper-DHQ were validated using a randomly selected 4 d food record recording period (including a weekend day) and two randomly selected 24 h dietary recalls during the 4 weeks intervening between these two diet… CONTINUE READING