Table 1. Distribution of selected demographic variables and risk factors in NSCLC cases and controls.
| Variable | Overall Cases (n = 521) | Overall Controls (n = 1,030) | Pa |
|---|---|---|---|
| n (%) | n (%) | ||
| Age (years) | 59.76 ± 10.71 | 60.34 ± 9.11 | 0.268 |
| Age (years) | 0.843 | ||
| < 60 | 238 (45.68) | 476 (46.21) | |
| ≥ 60 | 283 (54.32) | 554 (53.79) | |
| Sex | 0.453 | ||
| Male | 287 (55.09) | 588 (57.09) | |
| Female | 234 (44.91) | 442 (42.91) | |
| Smoking status | < 0.001 | ||
| Never | 317 (60.84) | 828 (80.39) | |
| Ever | 204 (39.16) | 202 (19.61) | |
| Alcohol use | < 0.001 | ||
| Never | 444 (85.22) | 949 (92.14) | |
| Ever | 77 (14.78) | 81 (7.86) | |
| BMI (kg/m2) | 23.00 (± 3.03) | 23.84 (± 3.06) | < 0.001 |
| BMI (kg/m2) | |||
| < 24 | 337 (64.68) | 547 (53.11) | < 0.001 |
| ≥ 24 | 184 (35.32) | 483 (46.89) |
a Two-sided χ2 test and Student t test