Table 1. Basic characteristics of lung cancer cases and controls.
| Lung cancer cases n (%) | Controls n (%) | OR (95% CI) | P-value | |
|---|---|---|---|---|
| (n = 384) | (n = 387) | |||
| Age (years) | ||||
| Mean (±SD) | 58 (±11) | 58 (±11) | 0.91a | |
| ≤40 | 21 (5.5) | 20 (5.2) | ||
| 41–50 | 70 (18.2) | 83 (21.4) | ||
| 51–60 | 125 (32.6) | 116 (30.0) | 0.69b | |
| >60 | 168 (43.8) | 168 (43.4) | ||
| Gender | ||||
| Male | 273 (71.1) | 276 (71.3) | ||
| Female | 111 (28.9) | 111 (28.7) | 0.95b | |
| Family history c | ||||
| Nod | 333 (86.7) | 382 (98.7) | 1.0 | |
| Yes | 51 (13.3) | 5 (1.3) | 11.70 (4.62-29.66) | <0.0001 b |
| Smoking history | ||||
| Neverd | 133 (34.6) | 206 (53.2) | 1.0 | |
| ≤20 (years) | 67 (17.4) | 73 (18.9) | 1.42 (0.96-2.11) | <0.0001 b |
| >20 (years) | 184 (47.9) | 108 (27.9) | 2.64 (1.91-3.64) |
a
For t' test
b
For χ2 test (two-sided), boldface means statistical significance
c
Family history of cancer
d
No family history group and Never smoking group as reference category, respectively