Abstract P306: Racial/Ethnic Differences In Self-reported Sedentary Time Are Related To Differential Risk For Prevalent Hypertension: NHANES 2011-2016

Abstract

Introduction: Evidence suggests there are racial/ethnic differences in lifestyle behaviors that may affect cardiovascular health outcomes such as physical activity engagement, diet, and sleep duration. However, the literature on racial/ethnic differences in sedentary time (ST) and whether these differences may be related differentially to cardiovascular health is limited. The goals of this study are to investigate racial/ethnic differences in self-reported ST, and examine if the modifying effect of ST with race/ethnicity will be associated with hypertension (HTN) prevalence. Methods: Adults (N=15903, age ≥20 yrs) from the National Health and Nutrition Examination Survey (NHANES) 2011-2016 reported their race/ethnicity (Mexican American [MA], Other Hispanic [OH], non-Hispanic White [NHW], non-Hispanic Black [NHB], non-Hispanic Asian, Other or mixed race [OM]), ST on a typical day (median split at 6 hrs: Low vs. High ST), and history of physician diagnosed HTN (yes/no). Weighted logistic regression models were conducted to examine the association between race/ethnic groups and ST, and combined racial/ethnic-ST groups (reference group: NHW with Low ST) on HTN prevalence while controlling for age, sex, education, body mass index, smoking status, moderate-vigorous physical activity min/wk, and history of diabetes, cardiovascular (i.e., heart failure, myocardial infarction, stroke, coronary heart disease) and kidney conditions. Results: There was a significant association between race/ethnic groups and ST (Wald F [5,43]=23.4, p <0.001) such that compared to NHW, MA (OR=.43, 95%CI:.36,.51) OH (OR=.51, 95%CI:.42,.62), and OM (OR=.71, 95%CI:.55,.91) had lower odds for High ST. Weighted percent of the sample with HTN was 32.6%. There was a significant effect of combined race by ST groups on HTN (Wald F [11,37] = 9.8, p <0.001). Compared to NHW with Low ST, MA (OR=.70, 95%CI: .54,.90) and OH (OR=.79, 95%CI: .64,.97) with Low ST had lower odds for HTN, whereas NHB with Low ST (OR=1.58, 95%CI: 1.34,1.87) and High ST (OR=1.76, 95%CI: 1.50,2.07) had increased odds of HTN. Conclusion: In a large national cohort, daily ST differed by race/ethnicity, and ST modified the association between race/ethnicity and odds for HTN such that compared to more active NHW, more active Hispanic groups had decreased odds for HTN, but NHB regardless of ST had increased risk for HTN. ST may be a key modifiable risk factor in addressing race/ethnic disparities in cardiovascular health.