Table 1. Characteristics of the studied population of NSCLC patients and normal controls.
| Variables | NSCLC patients (n = 600) | Normal controls (n = 998) | p value2 | |
|---|---|---|---|---|
| Age (years) | ≤ 60 | 330 (55.0%)1 | 556 (55.7%) | 0.782 |
| > 60 | 270 (45.0%) | 442 (44.3%) | ||
| Gender | Male | 428 (71.3%) | 696 (69.7%) | 0.499 |
| Female | 172 (28.7%) | 302 (30.3%) | ||
| Smoking status | Ever | 167 (27.8%) | 250 (25.1%) | 0.220 |
| Never | 433 (72.2%) | 748 (74.9%) | ||
| Alcohol status | Ever | 192 (32.0%) | 294 (29.5%) | 0.285 |
| Never | 408 (68.0%) | 704 (70.5%) | ||
1 Numbers in parentheses, percentage.
2 Age, gender, smoking status and alcohol status distributions of NSCLC patients and normal controls were compared using two-sided χ2 test.