Ethnic disparities and lifestyle determinants in the prevalence of cardiovascular disease among Han majority and Ha Ni ethnic minority older adults in rural Southwest China

OBJECTIVES: Cardiovascular disease (CVD) is the leading cause of death in China. This study compared ethnic disparities and lifestyle determinants in the prevalence of CVD (hypertension, coronary heart disease [CHD], and stroke) among older adults of the Han majority and Ha Ni ethnic minority in rural southwest China, to provide evidence for preventing and controlling CVD among older-adult minority communities. METHODS: A multi-stage stratified random sampling method was used to select 1,413 Han majority participants and 1,402 Ha Ni ethnic minority participants aged ≥ 60 years in rural Southwest China. Data on general demographic characteristics, behavioral lifestyle, and self-reported diagnostic information for patients with CHD and stroke were collected using a standardized questionnaire. The height, weight, waist circumference, and blood pressure of each participant were recorded. The relationship between lifestyle factors and CVD was analyzed using multivariate logistic regression. RESULTS: Han majority older adults had a higher prevalence of CHD (6.4% vs. 3.6%) and stroke (7.9% vs. 2.9%) than their Ha Ni minority counterparts (P < 0.01). Han majority participants had a markedly higher prevalence of obesity, central obesity, and physical inactivity than their Ha Ni ethnic minority counterparts (9.2%, 48.3%, and 55.1% vs. 3.4%, 19.1%, and 49.2%, respectively, P < 0.01). By contrast, Ha Ni ethnic minority participants had a higher prevalence of current drinking than Han majority participants (31.2% vs. 14.4%, P < 0.01). Among Han majority and Ha Ni ethnic minority older adults, participants with central obesity (OR = 2.09, 95% CI: 1.62-2.69 vs. OR = 2.66, 95% CI: 1.88-3.76) had a higher risk of hypertension, participants with obesity (OR = 1.99, 95% CI: 1.02-3.67 vs. OR = 3.66, 95% CI: 1.39-9.66) were more likely to suffer from CHD, and participants with physical inactivity (OR = 1.88, 95% CI: 1.18-2.98 vs. OR = 2.29, 95% CI: 1.13-4.64) had a higher probability of suffering from stroke. Furthermore, Current drinking status increased the risk of CHD (OR = 2.31, 95% CI: 1.05-5.08), but decreased the risk of stroke (OR = 0.33, 95% CI: 0.13-0.83) in Ha Ni ethnic minority participants. CONCLUSION: CHD and stroke are more prevalent among the Han majority older adults in rural Southwest China, and lifestyle factors significantly influence CVD.