Validity and reproducibility of Web-based food frequency questionnaire

Research Project

Project/Area Number	21700755
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Eating habits, studies on eating habits
Research Institution	至学館大学 (2010) Nara Women's University (2009)
Principal Investigator	OKAMOTO Naoko 至学館大学, 健康科学部, 助教 (70437507)
Project Period (FY)	2009 – 2010
Project Status	Completed (Fiscal Year 2010)
Budget Amount *help	¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000) Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2009: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords	妥当性 / 再現性 / インターネット / 食物摂取頻度調査法 / 食物摂取頻度調査 / 食事調査
Research Abstract	Web-based food frequency questionnaire (ITFFQ), that make it possible to reply to questionnaire while watching 3 dimension full-scale image data of food to make a precise estimate of portion sizes on the screen, was developed to assess habitual dietary intake. This time, the ITFFQ was evaluated validity and reproducibility by comparing with weighted dietary records for 3 days (WDR) for 88 subjects aged 20-30 years. The correlation coefficients between ITFFQ and WDR for energy, protein, fat, and carbohydrate were 0.386, 0.278, 0.164, 0.264, respectively, and there was significant correlation between the two methods at the p<0.05 level. Similarly, there was significant correlation between the two ITFFQ examined at monthly intervals. The results of this study indicated that the ITFFQ is valid and reproducible, and thus, it is useful questionnaire for assessing habitual dietary intake.