Use of accelerometer data in prediction equations for capturing implausible dietary intakes in adolescents  

Oleh:

Noel, Sabrina E ; Mattocks, Calum ; Emmett, Pauline M. ; Riddoch, Chris J ; Ness, Andrew R ; Newby, PK

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Clinical Nutrition vol. 92 no. 06 (Dec. 2010), page 1436-1445 .
Topik: NUTRITIONAL EPIDEMIOLOGY; PUBLIC HEALTH; Physical Activity
Fulltext: Am J Clin Nutr-2010-Noel-1436-45.pdf (107.96KB)

Ketersediaan

Perpustakaan FK Nomor Panggil: A07.K.2010.02 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Background: Reporting errors have been quantified in epidemiologic studies by comparing reported intakes with predicted energy requirements (pERs). Several studies lacking measures of physical activity level (PAL) assigned low-active levels to obtain pERs. Objective: We applied objective physical activity measures to current methods to quantify dietary reporting errors and compared associations with anthropometric and dietary variables among plausible and implausible reporters. Design: This study included 2868 adolescents with an average age of 13 y. Three-day dietary records, accelerometers, and dual-energy X-ray absorptiometry were used to assess diet, activity, and body composition, respectively. Three variations of physical activity coefficients were used: 1) assigning low physical activity coefficients (PAlow), 2) calculating PAL values (PAPAL), and 3) applying minutes of moderate-to-vigorous physical activity (PAMVPA). Results: Of the total participants, 51.5%, 51.8%, and 37.1% of the PAlow, PAPAL, and PAMVPA groups, respectively, were classified as underreporters, and 40.8%, 37.9%, and 42.4% of the respective groups were classified as plausible reporters. Underreporters had a higher body mass index, body fat, and waist circumference than did plausible reporters (P < 0.001 for all). Overreporters had a lower weight and body fat than did plausible reporters (P < 0.001 for all). Underreporters reported lower dairy and calcium intakes than did plausible reporters; the results were attenuated with adjustment for total energy. Conclusion: Accounting for objective physical activity measures to quantify reporting errors resulted in different and potentially more reasonable proportions of implausible reporters.

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