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Tobacco smoking-associated risk for tuberculosis: a case-control study
Harvir S Gambhir1, Rajeev M Kaushik, Reshma Kaushik
1Department of Medicine, Himalayan Institute of Medical Sciences, HIHT University, Swami Rama Nagar, P.O. Doiwala, Dehradun-248140, Uttarakhand, India.
International Health
|September 17, 2013
Summary
Tobacco smoking significantly increases tuberculosis risk, particularly with beedi use. The risk escalates with smoking duration and quantity, highlighting smoking as a key factor in TB development.
Area of Science:
- Public Health
- Epidemiology
- Respiratory Medicine
Background:
- Tuberculosis (TB) remains a major global health concern.
- The role of tobacco smoking as a risk factor for TB is often underestimated.
- Understanding modifiable risk factors like smoking is crucial for TB prevention strategies.
Purpose of the Study:
- To investigate the association between tobacco smoking and the risk of developing tuberculosis.
- To differentiate the risks associated with different types of tobacco products (cigarettes vs. beedis).
- To determine how smoking quantity and duration influence TB risk.
Main Methods:
- A case-control study was conducted with 95 TB patients and 190 controls in Dehradun, India.
- Participants were interviewed regarding their smoking status, type, quantity, and duration of tobacco use.
- Statistical analysis, including odds ratios (ORs) and logistic regression, was used to assess associations.
Main Results:
- Smoking tobacco collectively showed a significant odds ratio (OR) of 3.53 for TB.
- Beedi smoking had a higher OR (4.49) compared to cigarette smoking (1.65).
- Increased duration and quantity of smoking were strongly associated with higher TB risk (P < 0.0001).
- Smoking was independently associated with TB (OR 3.05) after adjusting for other factors like previous TB contact and malnutrition.
Conclusions:
- Tobacco smoking is a significant risk factor for both pulmonary and extra-pulmonary tuberculosis.
- Beedi smoking demonstrates a stronger association with TB than cigarette smoking.
- The risk of developing TB is dose-dependent on the duration and quantity of tobacco smoked.
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