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Table 2 Association between tuberculosis and cigarette smoking

From: Review of cigarette smoking and tuberculosis in China: intervention is needed for smoking cessation among tuberculosis patients

Variables Case(n = 613) n(%) Control(n = 1226) n(%) cOR(95% CI) aOR(95% CI)
Cigarette smoking
   Never 278(45.4) 673(54.9) Ref. Ref.
   Ever 335(54.6) 553(45.1) 1.47(1.21–1.78) 1.93(1.51–2.48)
Former 58(9.5) 93(7.6) 1.51(1.06–2.16) 1.95(1.32–2.87)
Current 277(45.2) 460(37.5) 1.46(1.19–1.79) 1.93(1.49–2.49)
Age of starting smoking (years)
   Never 278(45.4) 673(54.9) Ref. Ref.
   < 25 209(34.1) 325(26.5) 1.56(1.25–1.95) 2.09(1.59–2.75)
   ≥ 25 126(20.5) 228(18.6) 1.34(1.03–1.73) 1.72(1.28–2.33)
Smoking years     
   Never 278(45.4) 673(54.9) Ref. Ref.
   < 30 135(22.0) 256(20.9) 1.28(0.99–1.64) 1.62(1.19–2.19)
   ≥ 30 200(32.6) 297(24.2) 1.63(1.30–2.05) 2.23(1.68–2.97)
Cigarettes per day     
   Never 278(45.4) 673(54.9) Ref. Ref.
   < 19 107(17.5) 204(16.6) 1.27(0.97–1.67) 1.67(1.22–2.29)
   ≥ 19 228(37.2) 349(28.5) 1.58(1.27–1.97) 2.08(1.59–2.72)
Cumulative pack-years     
   Never 278(45.4) 673(54.9) Ref. Ref.
   < 29 164(26.8) 299(24.4) 1.33(1.05–1.68) 1.73(1.30–2.31)
   ≥ 29 171(27.9) 254(20.7) 1.63(1.28–2.07) 2.18(1.63–2.91)
  1. †cOR: crude odds ratio; ‡aOR: adjusted odds ratio, adjusting for age, gender and alcohol drinking history
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