手法を比較

	食物頻度質問票（FFQ）	栄養自己効力感尺度（DASES / 糖尿病自己効力感尺度）
分野	栄養学	栄養学
系統	Process / pipeline	Process / pipeline
提唱年	1986	2003
提唱者	Walter C. Willett, Harvard T.H. Chan School of Public Health	Kate Lorig, Philip L. Ritter, Farrokh Alavifard (Stanford Patient Education Center)
種類	Self-administered questionnaire (retrospective dietary assessment)	Self-report confidence scale
原典	Willett, W. C. (1998). Nutritional Epidemiology (2nd ed.). Oxford University Press.	Lorig, K., Ritter, P. L., Villa, F., & Piette, J. D. (2009). Spanish language diabetes self-management with and without automated telephone reinforcement: two randomized trials. Diabetes Care, 32(3), 408-414.
別名	FFQ, food-frequency-assessment	DASES, diabetes-self-efficacy, nutrition-efficacy
関連	5	5
概要	The Food Frequency Questionnaire is a self-administered dietary assessment tool designed to measure habitual food and nutrient intake over an extended period (typically 6–12 months). Developed by epidemiologists, particularly Walter Willett at Harvard, the FFQ has become a cornerstone of nutritional epidemiology research, enabling large-scale studies to assess dietary patterns and examine diet-disease relationships. FFQs vary in length (50–200+ items) and focus, but all share the purpose of estimating average dietary intake in a time-efficient manner suitable for population studies.	The Nutrition Self-Efficacy Scale, sometimes called the Diabetes Self-Efficacy Scale (DASES), is an 8-item instrument measuring confidence in performing diet-related behaviors and self-management skills. Developed by Lorig and colleagues at the Stanford Patient Education Center in 2003, it is based on self-efficacy theory and measures respondents' confidence in their ability to eat healthily, manage portions, choose healthful foods, and overcome dietary barriers. The scale is used in diabetes care, weight management, and general nutrition intervention research.