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) |