The association between sociodemographic status and COPD and asthma mortality, DALY and YLD in southern China, 2005–2015

Abstract

BackgroundLittle is known about the disease burden of chronic obstructive pulmonary disease (COPD) and asthma in southern China. MethodWe calculated the mortality, disability-adjusted life-years (DALY), years lived with disability (YLD) and years of life lost (YLL) for COPD and asthma in Guangdong province between 2005 and 2015. We examined the significance of trends of mortality, DALY, YLD and YLL rates for COPD and asthma with the Cochran-Armitage trend test. We also analyzed their association with sociodemographic factors by negative binomial models. ResultThe age-standardized mortality, DALY, YLD and YLL rates of COPD and asthma decreased significantly in Guangdong, except for an increase of 11.3% in the age-standardized YLD rate of COPD between 2005 and 2015 (all P < 0.05). Compared with females, the respective adjusted mortality rate ratio of males was 2.11 for COPD, and 0.74 for asthma. Compared with other regions, the richest region, Pearl River Delta, had the lowest mortality, DALY, YLD and YLL rate ratios (RR) of COPD and asthma (all P < 0.05). COPD and asthma mortality, DALY, YLD and YLL rates increased substantially with age. Specifically, when compared with the 25–49 years age group, the respective adjusted DALY RR of asthma was 1.91, 2.02 and 22.21 for 0–24, 50–74 and ≥75 years age group; the respective adjusted YLD RR was 2.27, 1.33 and 7.17 for 0–24, 50–74 and ≥75 years age group. ConclusionsDisease burden of COPD and asthma decreased in Guangdong province in southern China between 2005 and 2015; however, a disproportionate burden of COPD and asthma in terms of age, sex and regions was observed. The relatively high disease burden and high rate of impaired public health from the less developed regions highlight the need for focused policy making to address the problem.