Prevalence and Associated Factors of COPD among Hypertensive Patients aged 40 Years or Older in China, 2014 -15

Abstract

Abstract Background COPD and hypertension not only share some risk factors, but also interact in terms of disease progression and death. There are about 300 million hypertensive patients in China, but there is a scarcity of evidence on the prevalence and associated factors of COPD in hypertension population. This study aimed to analyze the prevalence and associated factors of COPD among hypertensive patients in China. Methods Data were collected as part of a large-scale and nationally representative sample survey conducted in 125 counties (districts) in 31 provinces (autonomous regions and municipalities) of mainland China aged 40 or above, 2014 -15, which consisted of 24,664 hypertensive patients. The prevalence and associated factors of COPD were analyzed among hypertensive patients population using the Chi-square test and multivariate logistic regression model. Results The prevalence of COPD among hypertensive patients aged ≥ 40 years was 15.6% (95% confidence interval [95% CI],0.15–0.16), with a prevalence of 21.9% (95% CI,0.21–0.23) for men and 9.0% (95% CI,0.08–0.10) for women. Among the hypertensive patients, the prevalence of COPD was significantly higher in those who were male (odds ratio [OR], 2.05; 95% CI, 1.82–2.31), aged 70 years or older (OR, 6.00; 95% CI, 5.09–7.01), underweight (OR, 1.54; 95% CI, 1.18–2.05), current smoker(OR, 1.72; 95% CI, 1.53–1.93), with hospital admission due to severe pulmonary diseases in childhood (OR, 1.82; 95% CI, 1.41–2.36), history of tuberculosis (OR, 1.39; 95% CI, 1.08–1.79), with family history of lung diseases (OR, 1.64; 95% CI, 1.50–1.80), with indoor exposure to biomass for cooking or heating (OR, 1.10; 95% CI, 1.01–1.21), and with exposure to dust /chemicals in the workplace (OR, 1.20; 95% CI, 1.10–1.30), compared with their counterparts. Conclusions The prevalence of COPD is high in hypertensive patients aged 40 or above in China, which is associated with male gender, older age, less education, low weight, smokers, disease or family history of lung-related diseases, and exposure to dust /chemicals or biofuels. It would be of value to carry out health education, screening and comorbidity co-management for COPD relying on the hypertension community-based health management service among hypertensive patients aged 40 or above.