Research
Energy balance
Correlation coefficients comparing calorie-adjusted nutrient intakes from the questionnaire with those from diet records ranged from 0.28 to 0.62.
The questionnaire can provide reliable estimates of past dietary intake.
StrongSupportsmedium confidence
Correlation coefficients comparing calorie-adjusted nutrient intakes computed from the questionnaire with those obtained from a compressed version of the questionnaire completed during diet record keeping ranged from 0.44 for total carbohydrate to 0.62 for vitamin C including supplements.
Why this rating
The study design involves a comparison of dietary assessment methods with established records.
Source
THE USE OF A SELF-ADMINISTERED QUESTIONNAIRE TO ASSESS DIET FOUR YEARS IN THE PAST
Walter C. Willett et al. · American Journal of Epidemiology · 1988
DOI 10.1093/oxfordjournals.aje.a114780
other · n=150Cited 802×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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