Table 1.
Characteristics of lung cancer cases and cancer-free controls
| Variables | Controls (n = 263) | Cases (n = 263) | P value |
|---|---|---|---|
| Age (years, mean ± SD) | 59.8 ± 10.1 | 59.6 ± 10.6 | 0.712a |
| Gender (n, %) | 1.000b | ||
| Male | 216 (82.1) | 216 (82.1) | |
| Female | 47 (17.9) | 47 (17.9) | |
| Smoking status (n, %) | <0.0001b | ||
| Non-smoker | 106 (40.3) | 61 (23.2) | |
| Light smoker | 88 (33.5) | 60 (22.8) | |
| Heavy smoker | 69 (26.2) | 142 (54.0) | |
| Family history of cancer (n, %) | 0.026b | ||
| No | 259 (98.5) | 250 (95.1) | |
| Yes | 4 (1.5) | 13 (4.9) |
aStudent’s t test
bChi-square test