Table 1.
Characteristics of patients and controls.
| Characteristics |
Lung cancer (n = 309) |
Control (n = 310) |
||
|---|---|---|---|---|
| Age (means ± SD, year) | 58.2 ± 10.2 | 50.3 ± 8.1 | ||
| Sex | ||||
| Male | 235 | 76.1 | 197 | 63.5 |
| Female | 74 | 23.9 | 113 | 36.5 |
| Smoking status | ||||
| Never | 94 | 30.4 | 188 | 60.6 |
| Ever | 215 | 69.6 | 122 | 39.4 |
|
| ||||
| No. | % | |||
|
| ||||
| Histology | ||||
| Adenocarcinoma | 110 | 35.6 | ||
| Squamous cell carcinoma | 116 | 37.5 | ||
| Small-cell carcinoma | 66 | 21.3 | ||
| Large-cell carcinoma | 2 | 0.6 | ||
| Unspecified lung cancer | 15 | 5.0 | ||
| Stage | ||||
| I | 67 | 21.7 | ||
| II | 52 | 16.8 | ||
| III | 69 | 22.3 | ||
| IV | 118 | 38.2 | ||
| Data uncertain | 3 | 1.0 | ||