24-Hour Dietary Recall
Structured interview in which a trained interviewer asks the respondent to recall all foods and beverages consumed in the previous 24-hour period, typically using a multiple-pass approach.
Also: 24HR
USDA's Automated Multiple-Pass Method (AMPM) is the standard. Multiple non-consecutive recalls capture usual intake distributions better than a single recall. Underreporting (especially of total energy and high-fat/sweet items) is common, validated against doubly labeled water (~15-30% underreport on average). 24HRs are the basis of NHANES, the dietary backbone of US nutrition policy.
How one textbook covers it
Modern Nutrition in Health and Disease, 12th ed. — Ch 49: Dietary Assessment Methods
USDA's Automated Multiple-Pass Method (AMPM) is the standard. Multiple non-consecutive recalls capture usual intake distributions better than a single recall. Underreporting (especially of total energy and high-fat/sweet items) is common, validated against doubly labeled water (~15-30% underreport on average). 24HRs are the basis of NHANES, the dietary backbone of US nutrition policy.
Related terms
Doubly labeled water, FFQ, NHANES