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ABSTRACT: Importance
When combusted indoors, solid fuels generate a large amount of pollutants such as fine particulate matter.Objective
To assess the associations of solid fuel use for cooking and heating with cardiovascular and all-cause mortality.Design, setting, and participants
This nationwide prospective cohort study recruited participants from 5 rural areas across China between June 2004 and July 2008; mortality follow-up was until January 1, 2014. A total of 271?217 adults without a self-reported history of physician-diagnosed cardiovascular disease at baseline were included, with a random subset (n?=?10?892) participating in a resurvey after a mean interval of 2.7 years.Exposures
Self-reported primary cooking and heating fuels (solid: coal, wood, or charcoal; clean: gas, electricity, or central heating), switching of fuel type before baseline, and use of ventilated cookstoves.Main outcomes and measures
Death from cardiovascular and all causes, collected through established death registries.Results
Among the 271?217 participants, the mean (SD) age was 51.0 (10.2) years, and 59% (n?=?158?914) were women. A total of 66% (n?=?179?952) of the participants reported regular cooking (at least weekly) and 60% (n?=?163?882) reported winter heating, of whom 84% (n?=?150?992) and 90% (n?=?147?272) used solid fuels, respectively. There were 15?468 deaths, including 5519 from cardiovascular causes, documented during a mean (SD) of 7.2 (1.4) years of follow-up. Use of solid fuels for cooking was associated with greater risk of cardiovascular mortality (absolute rate difference [ARD] per 100?000 person-years, 135 [95% CI, 77-193]; hazard ratio [HR], 1.20 [95% CI, 1.02-1.41]) and all-cause mortality (ARD, 338 [95% CI, 249-427]; HR, 1.11 [95% CI, 1.03-1.20]). Use of solid fuels for heating was also associated with greater risk of cardiovascular mortality (ARD, 175 [95% CI, 118-231]; HR, 1.29 [95% CI, 1.06-1.55]) and all-cause mortality (ARD, 392 [95% CI, 297-487]; HR, 1.14 [95% CI, 1.03-1.26]). Compared with persistent solid fuel users, participants who reported having previously switched from solid to clean fuels for cooking had a lower risk of cardiovascular mortality (ARD, 138 [95% CI, 71-205]; HR, 0.83 [95% CI, 0.69-0.99]) and all-cause mortality (ARD, 407 [95% CI, 317-497]; HR, 0.87 [95% CI, 0.79-0.95]), while for heating, the ARDs were 193 (95% CI, 128-258) and 492 (95% CI, 383-601), and the HRs were 0.57 (95% CI, 0.42-0.77) and 0.67 (95% CI, 0.57-0.79), respectively. Among solid fuel users, use of ventilated cookstoves was also associated with lower risk of cardiovascular mortality (ARD, 33 [95% CI, -9 to 75]; HR, 0.89 [95% CI, 0.80-0.99]) and all-cause mortality (ARD, 87 [95% CI, 20-153]; HR, 0.91 [95% CI, 0.85-0.96]).Conclusions and relevance
In rural China, solid fuel use for cooking and heating was associated with higher risks of cardiovascular and all-cause mortality. These risks may be lower among those who had previously switched to clean fuels and those who used ventilation.
SUBMITTER: Yu K
PROVIDER: S-EPMC5933384 | biostudies-literature | 2018 Apr
REPOSITORIES: biostudies-literature
JAMA 20180401 13
<h4>Importance</h4>When combusted indoors, solid fuels generate a large amount of pollutants such as fine particulate matter.<h4>Objective</h4>To assess the associations of solid fuel use for cooking and heating with cardiovascular and all-cause mortality.<h4>Design, setting, and participants</h4>This nationwide prospective cohort study recruited participants from 5 rural areas across China between June 2004 and July 2008; mortality follow-up was until January 1, 2014. A total of 271 217 adults ...[more]