title: Validity of the 24-hr. dietary recall and seven-day record for group comparisons.
abstract: The internal validity of a 24-hr. dietary recall and a seven-day dietary record was investigated among a group of non-institutionalized elderly subjects who were participating in a congregate meals program. Internal validity was assessed by comparing reported intake with unobtrusively obtained data on actual intake. Validity results suggest that the recall is prone to over-reporting low intakes and under-reporting high intakes. This pattern has been referred to as the "flat-slope syndrome." Records collected during the first few dyas were less prone to this syndrome; however, validity declined by the fifth, sixth, and seventh record days. Also, as the record progressed to the seventh day, the demographic nature of the sample became biased due to drop-outs and decreased usability of the records.
mesh_terms: D000368:Aged; D002791:Cholesterol, Dietary; D004034:Diet Surveys; D004044:Dietary Proteins; D002149:Energy Intake; D005069:Evaluation Studies as Topic; D005522:Food Services; D006801:Humans; D008568:Memory; D011939:Mental Recall; D008903:Minerals; D009749:Nutrition Surveys; D009747:Nutritional Physiological Phenomena; D012044:Regression Analysis; D013997:Time Factors; D014815:Vitamins
chemical_list: D002791:Cholesterol, Dietary; D004044:Dietary Proteins; D008903:Minerals; D014815:Vitamins