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[Case-control studies on risk factors for pulmonary tuberculosis in servicemen of China]
1Institute for Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing.
Objective:
To study the risk factors for pulmonary tuberculosis (PTB) in the servicemen of armed forces and lay a basis for its prevention and control.
Methods:
A 1:2 matched case-control study was carried cut in the servicemen, with 86 cases and 153 controls. Data were analyzed with conditional logistic regression with EGRET software. Odds ratios (ORs) were calculated for the relevant factors.
Results:
Single-variable analysis showed that schooling, history of exposure to PTB, history of Bacille Calmette-Guérin (BCG) vaccination and BCG vaccination scar all associated with the incidence of PTB, with ORs of 2.19, 2.03, 0.38 and 0.54, respectively, and P < 0.05. Multiple logistic regression analysis showed that BCG vaccination scar, history of exposure to PTB and schooling all entered the final regression model, with ORs of 0.36, 1.94 and 2.33, respectively.
Conclusion:
It suggested that BCG vaccination could play a role in the prevention of TB in the servicemen, and history of exposure to PTB was a potential risk factor for TB as well.