title: Validation of reported physical activity for cholesterol control using two different physical activity instruments.
abstract: The National Cholesterol Education Program recommends increasing physical activity to improve cholesterol levels and overall cardiovascular health. We examined whether US adults who reported increasing their physical activity to control or lower blood cholesterol following physician's advice or on their own efforts had higher levels of physical activity than those who reported that they did not. We used data from the National Health and Nutrition Examination Survey 2003-2004, which implemented two physical activity assessment instruments. The physical activity questionnaire (PAQ) assessed self-reported frequency, intensity, and duration of leisure-time, household, and transportation-related physical activity in the past month. Physical movement was objectively monitored using a waist accelerometer that assessed minute-by-minute intensity (counts of movement/minute) during waking time over a 7-day period. We adjusted our analysis for age, gender, race/ethnicity, educational attainment, and body mass index. Participants who reported increasing physical activity to control blood cholesterol had more PAQ-assessed physical activity and more accelerometer-assessed active days per week compared to those who did not. However, there were no significant differences in cholesterol levels between comparison groups. These findings suggest that self-report of exercising more to control or lower cholesterol levels among US adults might be valid.
authors.affiliation: Behavioral Surveillance Branch, Division of Adult and Community Health, NCCDPHP, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, MS K-66, Atlanta, GA 30341, USA. afan@cdc.gov
authors.forename: Amy Z
authors.initials: AZ
authors.lastname: Fan
authors.forename: Sandra A
authors.initials: SA
authors.lastname: Ham
authors.forename: Shravani Reddy
authors.initials: SR
authors.lastname: Muppidi
authors.forename: Ali H
authors.initials: AH
authors.lastname: Mokdad
mesh_terms: D015415:Biomarkers / Q000097:blood; D002784:Cholesterol / Q000097:blood*; D015444:Exercise; D005260:Female; D019538:Health Care Surveys; D006266:Health Education; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D006937:Hypercholesterolemia / Q000097:blood / Q000503:physiopathology / Q000628:therapy*; D008019:Life Style; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000295:instrumentation; D009313:National Health Programs; D010349:Patient Compliance; D010353:Patient Education as Topic; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D040242:Risk Reduction Behavior; D011795:Surveys and Questionnaires; D013997:Time Factors; D014481:United States
chemical_list: D015415:Biomarkers; D002784:Cholesterol
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