Association between household solid fuel use for cooking and sleep disturbance in rural China: findings from the China Kadoorie Biobank data.
BACKGROUND
Solid fuel use for cooking is a main source of household air pollution, particularly in rural China. Evidence on the association between household air pollution and sleep quality remains limited. This study aimed to examine the association between household solid fuels used for cooking and sleep disturbance.


METHODS
The data of 283,170 adults from baseline survey of the China Kadoorie Biobank Study were included. Detailed information about exposure to solid fuels used for cooking were collected. Sleep disturbance was indicated as any of the three sleep disorders, including disorders of initiating and maintaining sleep, disorders of early morning awakening, and daytime dysfunction. Logistic regression analysis was used to examine the association between sleep disturbance and level of exposure to household solid fuels used for cooking.


RESULTS
About 18% of participants reported sleep disturbance. Fully adjusted analysis indicated exposure to household solid fuels used for cooking was significantly associated with sleep disturbance. Compared to those with 0-3 years exposure (first tertile) to solid fuels used for cooking, the participants with 3-26 years exposure (second tertile) and >26 years exposure (third tertile) had greater odds of having sleep disturbance at 1.16 (95% CI: 1.12-1.19) and 1.33 (95% CI: 1.29-1.37) times, respectively.


CONCLUSIONS
Use of household solid fuels is associated with prevalence of sleep disturbance; the longer duration of exposure to solid fuels use for cooking, the higher is the prevalence of sleep disturbance. Further study is warranted to examine the underlying mechanisms of the association.
['Chair|Sek Ying|SY|', 'Choi|Kai Chow|KC|', 'Cao|Xi|X|', 'Cheng|Ho Yu|HY|', 'Chau|Janita Pak Chun|JPC|', 'Liu|Ting|T|', 'Chien|Wai Tong|WT|']
D000328:Adult D016902:Air Pollution, Indoor D018070:Biological Specimen Banks D002681:China D003296:Cooking D006801:Humans D012890:Sleep D012893:Sleep Wake Disorders
Solid fuel use Sleep disturbance Household air pollution