Research
Mixed
Averaged 24-hour recalls (ASA24) provide validity for energy-adjusted protein, sodium, and potassium intakes that is comparable to a single SFFQ, but lower than averaged 7-day dietary records.
If you use a digital 24-hour recall tool, averaging multiple days improves accuracy, but it may still be less valid than a 7-day paper food diary for nutrients like sodium. For critical nutrient tracking, a 7-day diary is superior.
StrongQualifiesHIGH confidence
In general, relative to biomarkers, averaged ASA24s had lower validity than the SFFQ completed at the end of the data-collection year (SFFQ2); SFFQ2 had slightly lower validity than 1 7DDR... the averaged 7DDRs had the highest validity.
Why this rating
Large sample, biomarker validation, deattenuated correlations.
Source
Relative Validity of Nutrient Intakes Assessed by Questionnaire, 24-Hour Recalls, and Diet Records as Compared With Urinary Recovery and Plasma Concentration Biomarkers: Findings for Women
Changzheng Yuan et al. · American Journal of Epidemiology · 2017
DOI 10.1093/aje/kwx328
cohort · n=627Cited 314×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- A 7-day dietary record (7DDR) provides higher relative validity for estimating nutrient intake compared to a single semiquantitative food frequency questionnaire (SFFQ) or averaged 24-hour recalls (ASA24) when validated against urinary and plasma biomarkers.Strong
- Food Frequency Questionnaires (FFQs) and 24-hour recalls significantly underreport total energy intake and sodium intake compared to objective biomarkers (Doubly Labeled Water and urinary sodium).Strong
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