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Passive Smoking Exposure in Living Environments Reduces Cognitive Function: A Prospective Cohort Study in Older Adults

Author

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  • Fan He

    (Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China
    Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Tian Li

    (Mailman School of Public Health, Columbia University Medical Center, New York, NY 10032, USA)

  • Junfen Lin

    (Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Fudong Li

    (Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Yujia Zhai

    (Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Tao Zhang

    (Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Xue Gu

    (Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Genming Zhao

    (Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China)

Abstract

There is currently no consensus regarding the effects of passive smoking exposure on cognitive function in older adults. We evaluated 7000 permanent residents from six regions within Zhejiang Province, China, aged ≥60 years, without cognitive impairment at baseline and during follow-up examinations for two years. The Chinese version of the Mini-Mental State Examination was used to assess the participants’ cognitive function. Multivariate regression analyses were carried out to calculate the adjusted relative risks (RRs) as measures of the association between passive smoking exposure and cognitive impairment after adjusting for potential confounders. The results showed an association between passive smoking exposure in the living environment and increased risk of cognitive impairment (RR: 1.16; 95% confidence interval (CI): 1.01–1.35). No dose–response relationship between the cumulative dose of passive smoking exposure (days) and cognitive impairment was observed. The results of stratified analyses suggested a harmful effect of passive smoking exposure on cognitive function in non-smokers (RR: 1.24; 95% CI: 1.06–1.46), but not in smokers (RR: 1.11; 95% CI: 0.71–1.92). Therefore, passive smoking exposure increased the risk of cognitive impairment in older adults, especially non-smokers. More effective measures to restrict smoking in the living environment should be developed and implemented.

Suggested Citation

  • Fan He & Tian Li & Junfen Lin & Fudong Li & Yujia Zhai & Tao Zhang & Xue Gu & Genming Zhao, 2020. "Passive Smoking Exposure in Living Environments Reduces Cognitive Function: A Prospective Cohort Study in Older Adults," IJERPH, MDPI, vol. 17(4), pages 1-11, February.
  • Handle: RePEc:gam:jijerp:v:17:y:2020:i:4:p:1402-:d:323584
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    References listed on IDEAS

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    1. A-Sol Kim & Hae-Jin Ko & Jin-Hyun Kwon & Jong-Myung Lee, 2018. "Exposure to Secondhand Smoke and Risk of Cancer in Never Smokers: A Meta-Analysis of Epidemiologic Studies," IJERPH, MDPI, vol. 15(9), pages 1-17, September.
    2. Roberto Bono & Valeria Bellisario & Roberta Tassinari & Giulia Squillacioti & Tilde Manetta & Massimiliano Bugiani & Enrica Migliore & Pavilio Piccioni, 2019. "Bisphenol A, Tobacco Smoke, and Age as Predictors of Oxidative Stress in Children and Adolescents," IJERPH, MDPI, vol. 16(11), pages 1-10, June.
    Full references (including those not matched with items on IDEAS)

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