Misreporting of Energy Intake in Older People: Comparison of Two Dietary Assessment Methods

Abstract

Accurate assessment of dietary intake is essential in clinical practice and research. While energy intake (EI) misreporting has been extensively studied in the general population, relatively little is known about misreporting among older people. This cross-sectional study used clinical data routinely collected in 127 participants, aged 70–96 years, from the Toulouse Frailty Clinic. EI was assessed by diet history interview and three-day food record. Misreporters were identified with the Goldberg cut-off method, using the Harris–Benedict equation to estimate total energy expenditure. The response rate was 66% for three-day food record and 93% for diet history interviews. EI from diet history interviews (1799 ± 416 kcal/day) was significantly higher than from food records (1400 ± 381 kcal/day; p < 0.001) and closest to total energy expenditure (1758 ± 437 kcal/day; (p > 0.05). Thirty percent of participants were identified as underreporters with three-day food records vs. 9% with diet history interviews. Overreporters were found with diet history interviews only (11% of participants). In older people, the diet history interview has the advantage of obtaining a higher response rate and a lower underreporting rate, compared to three-day food record. Nevertheless, with this method, overreporting was observed and interpreting results should be done with caution.