Published in:
21-10-2021 | Smoking and Nicotine Detoxification | Epidemiology • Original Article
Secondhand smoke is associated with poor sleep quality in self-reported never-smokers of Northwest China: a cross-sectional study
Authors:
Lin Wang, Mulalibieke Heizhati, Mei Li, Zhongrong Wang, Zhikang Yang, Reyila Abudereyimu, Wenbo Yang, Ling Yao, Nanfang Li
Published in:
Sleep and Breathing
|
Issue 3/2022
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Abstract
Objective
To investigate the relationship between secondhand smoke (SHS) exposure and sleep quality in never-smokers of Northwest China.
Methods
Never-smoking adults (≥ 15 years) from Xinjiang, Northwest China, were included in this cross-sectional survey between April and October 2019. SHS exposure in never-smokers was estimated using a structured questionnaire. Sleep quality was evaluated by Pittsburgh Sleep Quality Index (PSQI), with PSQI score > 5 classified as poor sleep quality. Association of SHS exposure and frequency and duration of SHS exposure with poor sleep quality were analyzed by using a multivariate logistic regression after adjusting for potential confounding factors, including stratification by sex.
Results
The mean age of participants was 48.0 years, and 77% were females. Of 21,198 never-smokers, 13% (n = 2703) reported SHS exposure and 35% (n = 7390) reported poor sleep quality. In multivariate logistic regression analysis, a significant association was observed between SHS exposure and poor sleep quality (adjusted odds ratio (OR), 1.36; 95% confidence interval (CI) 1.24–1.48). Subgroup analysis showed a negative association of SHS exposure with sleep quality in both sexes. However, a significant dose–response relationship of frequency and duration of SHS exposure per week with poor sleep quality was observed only in females. Consistent results were also observed in the aged ≥ 18 years.
Conclusion
Exposure to SHS is associated with poor sleep quality in never-smoking adults of Northwest China. A dose–response relationship between SHS exposure and poor sleep quality is found in women. Avoiding SHS exposure may have beneficial effects on sleep quality, especially for females.