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- Title
Self-Reported Versus Accelerometer-Measured Physical Activity and Biomarkers Among NHANES Youth.
- Authors
Belcher, Britni R.; Moser, Richard P.; Dodd, Kevin W.; Atienza, Audie; Ballard-Barbash, Rachel; Berrigan, David
- Abstract
Background: Discrepancies in self-report and accelerometer-measured moderate-to-vigorous physical activity (MVPA) may influence relationships with obesity-related biomarkers in youth. Methods: Data came from 2003-2006 National Health and Nutrition Examination Surveys (NHANES) for 2174 youth ages 12 to 19. Biomarkers were: body mass index (BMI, kg/m2), BMI percentile, height and waist circumference (WC, cm), triceps and subscapular skinfolds (mm), systolic & diastolic blood pressure (BP, mniHg), high-density lipoprotein (HDL, mg/dL), total cholesterol (mg/dL), triglycerides (mg/dL), insulin (µU/ml), C-reactive protein (mg/dL), and glycohemoglobin (%). In separate sex-stratified models, each biomarker was regressed on accelerometer variables [mean MVPA (min/day), nonsedentary counts, and MVPA bouts (mean min/day)] and self-reported MVPA. Covariates were age, race/ethnicity, SES, physical limitations, and asthma. Results: In boys, correlations between self-report and accelerometer MVPA were stronger (boys: r = 0.14–0.21; girls: r = 0.07–0.11; P < .010) and there were significant associations with BMI, WC, triceps skinfold, and SBP and accelerometer MVPA (P < .01). In girls, there were no significant associations between biomarkers and any measures of physical activity. Conclusions: Physical activity measures should be selected based on the outcome of interest and study population; however, associations between PA and these biomarkers appear to be weak regardless of the measure used.
- Subjects
SELF-evaluation; ACCELEROMETERS; PHYSICAL activity measurement; BIOMARKERS; CHILDHOOD obesity; BLOOD pressure; ETHNICITY
- Publication
Journal of Physical Activity & Health, 2015, Vol 12, Issue 5, p708
- ISSN
1543-3080
- Publication type
Article
- DOI
10.1123/jpah.2013-0193