title: The relationship of actigraph accelerometer cut-points for estimating physical activity with selected health outcomes: results from NHANES 2003-06.
abstract: The purpose of this study was to examine the influence of child and adult cut-points on physical activity (PA) intensity, the prevalence of meeting PA guidelines, and association with selected health outcomes. Participants (6,578 adults > or = 18 years, and 3,174 children and adolescents < or = 17 years) from the National Health and Nutrition Examination Survey 2003-06 (Centers for Disease Control and Prevention, 2006) wore an accelerometer for 7 days. PA intensity was estimated with 5 child-derived and 12 adult-derived cut-points. For all, the cut-point influenced PA intensity and the prevalence of meeting PA guidelines. Similarly, cut-point selection influenced the relationship between physical activity and various health outcomes. Future research should further enhance meaningful cut-points relevant to populations with diverse health and age profiles.
authors.affiliation: Department of Exercise Science, Bellarmine University, Louisville, KY 40205, USA. ploprinzi@bellarmine.edu
authors.forename: Paul D
authors.initials: PD
authors.lastname: Loprinzi
authors.forename: Hyo
authors.initials: H
authors.lastname: Lee
authors.forename: Bradley J
authors.initials: BJ
authors.lastname: Cardinal
authors.forename: Carlos J
authors.initials: CJ
authors.lastname: Crespo
authors.forename: Ross E
authors.initials: RE
authors.lastname: Andersen
authors.forename: Ellen
authors.initials: E
authors.lastname: Smit
mesh_terms: D000293:Adolescent; D000328:Adult; D002097:C-Reactive Protein / Q000032:analysis*; D002648:Child; D008076:Cholesterol, HDL / Q000097:blood*; D006306:Health Surveys; D006801:Humans; D018670:Monitoring, Ambulatory / Q000295:instrumentation*; D009043:Motor Activity; D009765:Obesity / Q000453:epidemiology; D005082:Physical Exertion; D017410:Practice Guidelines as Topic; D012372:ROC Curve; D012680:Sensitivity and Specificity
chemical_list: D008076:Cholesterol, HDL; D002097:C-Reactive Protein