Impact of tobacco smoking on tuberculosis recurrence in Uganda
Methods We conducted a retrospective review of records of adult TB patients who participated in the Kawempe District Household Contact Study from 20022009. TB recurrence was defined as a culture of M. tuberculosis from a patient who was declared cured of his/her initial TB episode. The associations between smoking and other risk factors for TB recurrence among this population were examined.
Results Of the 538 patients who completed TB treatment, 33 (6.1%) had a TB recurrence and 98 (18.2%) had ever smoked. Of those who smoked 13.3% had a recurrence of TB compared to 4.6% of those who had never smoked (P = 0.001). After univariate analysis, smoking was significantly associated with recurrence (OR=2.7; 95% CI = 1.4, 5.1). Positive HIV status, age 35+, male gender, cavitation, and fibrosis at end of treatment were also associated with TB recurrence. After multivariate analysis, smoking (aOR=2.3; 95% CI = 1.1, 5.9) and fibrosis at end of treatment (aOR=2.6; 95% CI = 1.4, 9.1) were independently associated with TB recurrence.
Conclusion Tobacco consumption is increasing in developing countries and smoking cessation during and after TB treatment is necessary to help prevent TB recurrence.
Public health or related research
Assess the relationship between tobacco smoking and tuberculosis recurrence Identify additional factors associated with tuberculosis recurrence
Keyword(s): Tuberculosis, Smoking
Qualified on the content I am responsible for because: I have studied tuberculosis recurrence in Kampala, Uganda for over 4 years. I have visited the Ugandan clinic that recruited and enrolled the patients and conducted analyses of tuberculosis recurrence (relapse vs. reinfection).
Any relevant financial relationships? No