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Secondhand smoke increases the risk of developing chronic obstructive pulmonary disease
Wen-Chi Su1, Huai-Lei Juan2,3, Jia-In Lee4
1Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.
Scientific Reports
|March 30, 2024
Summary
Secondhand smoke (SHS) exposure significantly increases the risk of developing chronic obstructive pulmonary disease (COPD) in never-smokers. Even brief, regular SHS exposure elevates COPD risk, highlighting the need for stricter anti-smoking policies.
Area of Science:
- Pulmonary Medicine
- Environmental Health
- Epidemiology
Background:
- Smoking is the primary risk factor for chronic obstructive pulmonary disease (COPD).
- Limited large-scale evidence exists on the association between secondhand smoke (SHS) exposure and COPD development.
- Non-smokers exposed to SHS face potential respiratory health risks.
Purpose of the Study:
- To investigate the longitudinal association between SHS exposure and the risk of developing COPD in never-smokers.
- To quantify the risk of incident COPD associated with SHS exposure.
- To explore a potential dose-response relationship between SHS exposure duration and COPD risk.
Main Methods:
- A longitudinal study utilizing data from the Taiwan Biobank, including 6519 never-smokers without prior COPD.
- Participants were categorized into SHS exposure and no exposure groups.
- Cox proportional hazards regression models were employed to assess the relative risk (RR) of COPD development, adjusting for confounders.
Main Results:
- After 48 months, 7% of the SHS-exposed group developed COPD compared to 4% in the unexposed group.
- SHS exposure was significantly associated with a higher risk of incident COPD (RR = 1.49; 95% CI 1.04-2.14; P=0.031).
- A dose-response relationship was observed, with each additional weekly hour of SHS exposure increasing COPD likelihood (RR = 1.03; 95% CI 1.00-1.05; P=0.027).
Conclusions:
- Secondhand smoke exposure is a significant contributing factor to the development of COPD in never-smokers.
- Findings underscore the importance of public awareness regarding SHS harms.
- The results provide evidence to support the formulation of comprehensive anti-smoking policies to mitigate SHS risks.
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