Association of cooking fuel with incident hypertension among adults in China: A population-based cohort study.

With an increasing prevalence of hypertension, indoor air-pollution factors began to attract extensive attention. However, the association of cooking fuel with the incidence of hypertension was inconsistent. The aim of this study was to investigate the association of household air-pollution caused by cooking fuel with the incidence of hypertension. Data were derived from the China Health and Nutrition Survey. Participants aged 18 years or older were eligible. A validated questionnaire was used to collect the information on the type of cooking fuel, including electricity, natural gas, coal, and wood/charcoal. Participants with a systemic blood pressure (SBP) ≥ 140 mmHg or /and a diastolic blood pressure (DBP) ≥ 90 mmHg without use of anti-hypertensive medications, or participants with an SBP/DBP < 140/90 mmHg but having hypertensive history or currently being taking anti-hypertensive medication were identified as hypertension. Multilevel Cox regressions were employed to examine the association of cooking fuel with incident hypertension. Compared to participants using electricity, participants using wood/charcoal had a higher incidence of hypertension (HR: 1.581; 95% CI: 1.373-1.821; and P < .001), which was independent of sex and living areas. Furthermore, this significant association was observed only in the participants aged 18-39 years (HR: 1.443; 95% CI: 1.131-1.840; and P = .003). Compared to participants using non-polluting energy, participants using solid fuel were more likely to develop hypertension (HR: 1.309; 95% CI: 1.191-1.439; and P < .001). In conclusion, household air-pollution was associated with the incidence of hypertension among Chinese adults. Using wood/charcoal or solid fuel in youth was associated with a higher incidence of hypertension later in life.