Abstract P281: Cardiovascular Health Correlates of Physical Activity and Sedentary Behavior Patterns in American Adults
Background: Latent class analysis, a data reduction tool, can be used to group people according to the patterns of physical activity in which they engage. Patterns of physical activity may be differentially associated with cardiovascular health measures. We explored the cross-sectional correlation of patterns in objectively measured physical activity and sedentary behavior with cardiovascular health measures.
Methods: Accelerometer data from National Health and Nutrition Examination Survey (NHANES) adult participants in 2003-2006 were used to derive latent classes describing patterns of physical activity and sedentary behavior. Latent classes were defined for both accelerometer measures: percent of wear time in moderate-to-vigorous physical activity [MVPA] and percent of wear time in sedentary behavior.
Obesity (body mass index ≥30 kg/m2), low- (LDL) and high-density lipoprotein cholesterol (HDL), triglycerides, and blood pressure were measured. Hypertension was defined as blood pressure >140/80 mmHg or treatment. Dyslipidemia was LDL ≥190 mg/dL or triglycerides ≥500 mg/dL. History of cardiovascular disease (CVD), diabetes, smoking status, and alcohol consumption (≥12 drinks/year) were self-reported.
We included participants ≥20 years with adherent accelerometer data for ≥8 hours/day on ≥3 days. Associations between latent classes and cardiovascular health measures were evaluated using Chi-square tests. Weights were used to account for the NHANES sampling design.
Results: Participants (N=7236) were more likely female (53%) and non-Hispanic white (73%), with a mean age of 47 years. The prevalence of obesity was 33%, hypertension 39%, and diabetes 11%. Twenty-three percent were current smokers and 9% had a history of CVD. Five latent classes were identified for MVPA and five for sedentary behavior.
Compared to the most active MVPA class (N=62), the least active MVPA class (N=5117) included more individuals with obesity (38 vs. 12%), hypertension (46 vs. 23%), diabetes (14 vs. 1%), and a history of CVD (12 vs. 0%). Former smokers and non-alcohol drinkers also were overrepresented in the least compared to most active class (27 vs. 20% and 31 vs. 21%, respectively). MVPA patterns were similar by dyslipidemia status.
Diabetics comprised 25% of the most sedentary class (N=641), compared to 5% of the least sedentary class (N=542). Those with obesity (40 vs. 27%) and hypertension (64 vs. 25%) also were overrepresented in the most compared to least sedentary class. Current smokers comprised 17% of the most and 31% of the least sedentary class, while formers smokers made up 40% of the most and 24% of the least sedentary class.
Conclusion: Measures of poor cardiovascular health were associated with less MVPA and more sedentary behavior. Understanding the correlates of physical activity and sedentary behavior patterns may help to inform interventions.
Author Disclosures: S.A. Jones: C. Other Research Support; Modest; University of North Carolina at Chapel Hill Royster Society Fellowship. C. Other Research Support; Significant; NHLBI NRS T32-HL007055-38. A.H. Herring: B. Research Grant; Modest; NIH/NHLBI R21 HL115385. F. Wen: B. Research Grant; Modest; NIH/NHLBI R21 HL115385. K.R. Evenson: B. Research Grant; Modest; NIH/NHLBI R21 HL115385.
- © 2015 by American Heart Association, Inc.