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[Passive smoking: a risk factor in the home environment]
L Fidanza1, G Franco, T Malamani
1Dipartimento di Medicina Preventiva, Università degli Studi di Pavia.
Giornale Italiano Di Medicina Del Lavoro
|September 1, 1986
Summary
Exposure to secondhand smoke, also known as environmental tobacco smoke, significantly increases lung cancer risk for nonsmokers. Living with smokers elevates cancer risk, particularly with more household smokers, affecting both smoking-related and other cancers.
Area of Science:
- Environmental Health
- Public Health
- Epidemiology
Background:
- Household environmental smoke is a significant air pollution source.
- Exposure to secondhand smoke is linked to respiratory illnesses, reduced respiratory function, and increased cancer risk in children and adults.
Purpose of the Study:
- To evaluate the association between passive smoking and lung cancer risk.
- To assess the cumulative risk of household exposure to cigarette smoke on overall cancer incidence.
Main Methods:
- Systematic review and meta-analysis of 10 case-control and 3 prospective epidemiological studies.
- Analysis of lung cancer risk in nonsmokers exposed to household smoking.
- Evaluation of cancer risk based on the number of household smokers.
Main Results:
- Nonsmokers living with smokers showed a 35% increased risk of lung cancer compared to those living with nonsmokers.
- Adjusted risk for lung cancer increased to 53% after accounting for potential misclassification of exposure.
- Overall cancer risk, including smoking-related and other cancers, increased progressively with the number of smokers in the household.
Conclusions:
- Breathing secondhand smoke (environmental tobacco smoke) is causally linked to health impairments, including lung cancer.
- Cumulative household exposure to cigarette smoke significantly elevates cancer risk.
- Evidence strongly supports that passive smoking poses a substantial health hazard.