Association between solid fuel use and nonfatal cardiovascular disease among middle-aged and older adults: Findings from The China Health and Retirement Longitudinal Study (CHARLS)
2022
Liu, Yang | Ning, Ning | Sun, Ting | Guan, Hongcai | Liu, Zuyun | Yang, Wanshui | Ma, Yanan
Few studies have been conducted on the association between domestic solid fuel combustion and incident nonfatal cardiovascular disease (CVD). We assessed the prospective association between domestic fuel type and incident nonfatal CVD among Chinese adults aged ≥45 years. This was a prospective cohort study using data from the China Longitudinal Study of Health and Retirement (CHARLS) that recruited 8803 participants ≥45 years in 2013. Household fuel types were assessed based on self-reports, including solid fuel (coal, crop residue, or wood fuel) and clean fuel (central heating, solar power, natural gas, liquefied petroleum gas, electricity, or marsh gas). Nonfatal CVD was defined as self-reported physician-diagnosed nonfatal CVD. We established Cox proportional hazard regression models with age as the time scale and strata by sex to evaluate the hazard ratios (HRs) and 95 % confidence intervals (95 % CIs). After a median follow-up of five years, 970 (11.02 %) nonfatal CVD cases were documented, including 423 (9.96 %) in males and 547 (12.01 %) in females. Participants with exposure to solid fuel for cooking and clean fuel for heating [HR (95 % CI):2.01 (1.36–2.96)], solid fuel for heating and clean fuel for cooking [HR (95 % CI):1.45 (1.06–1.99)], and solid fuel for both heating and cooking [HR (95 % CI):1.43 (1.07–1.92)] had an elevated nonfatal CVD risk compared to users of cleaner fuel for both cooking and heating. Those whom self-reported switching from solid fuels to cleaner fuels for cooking had significantly decreased nonfatal CVD risk [HR (95 % CI):0.76 (0.58–0.99)] than participants who did not switch to cleaner fuels. Exposure to domestic solid fuel burning for cooking or heating is associated with an elevated nonfatal CVD risk. Notably, switching cooking fuels from solid to cleaner fuels is related to a reduced risk of nonfatal CVD.
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