Does Electronic Cigarette Use Increase The Risk of Early-Onset Chronic Obstructive Pulmonary Disease (COPD) ? : A Systematic Review
Abstract
Introduction: The rapid proliferation of electronic cigarettes (e-cigarettes) has outpaced scientific understanding of their long-term health effects. A critical public health question is whether e-cigarette use independently increases the risk of early-onset Chronic Obstructive Pulmonary Disease (COPD), particularly in younger populations and never-smokers, a question complicated by high rates of dual use with combustible tobacco. Methods: This systematic review synthesized evidence from 80 RCT, etc. Data were extracted on study design, e-cigarette exposure definition, COPD diagnostic criteria (spirometry, ICD codes), control for combustible tobacco use (including pack-years), and risk estimates (OR, RR, aHR). A focused analysis was performed on studies restricting to never-smokers and younger adults (ages 18-50) to assess independent risk. Results: Significant positive associations between e-cigarette use and COPD/respiratory disease were found. Four major meta-analyses reported pooled ORs for current e-cigarette users versus non-users ranging from 1.48 (95% CI:1.36-1.61) to 1.84 (95% CI:1.51-2.23) (1,2,3,41). Crucially, in never-smokers, exclusive e-cigarette use was significantly associated with COPD (aHR 2.29,95%CI:1.42-3.71)(8) and a pooled OR of 1.44 (95%CI:1.42-1.46)(7). A dose-duration response was identified (aHR 1.28 per year of use, 95%CI:1.16-1.40)(9). Conversely, studies adjusting for combustible cigarette pack-years found no significant independent risk (aHR…
How strong is the evidence?
Evidence Hub reads this as a systematic review, done in people. Its evidence level is 1 of 5 (Highest · pooled evidence). Pooled evidence from several studies sits at the top of the evidence pyramid.
Read the paper
Related studies
- Tobacco and COPD: presenting the World Health Organization (WHO) Tobacco Knowledge Summary
- Comparative effects of e-cigarette smoking on periodontal status, salivary pH, and cotinine levels
- Association between exposure to environmental pollutants and increased oral health risks, a comprehensive review
- Influence of gestational window on offspring vascular health in rodents with in utero exposure to electronic cigarettes
- Natural products as kinase inhibitors in lung cancer: molecular mechanisms, therapeutic potential, and clinical trials
- Nicotine in electronic cigarettes
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.