Variables | Case (n = 384) | Control (n = 384) | P* |
---|---|---|---|
Age, y (mean ± SD) | 62.4 ± 10.8 | 61.5 ± 12.1 | 0.277 |
Gender, no. (%) | |||
Male | 222 (57.8) | 217 (56.5) | 0.715 |
Female | 162 (42.2) | 167 (43.5) | |
Smoking status, no. (%) | |||
Never | 228 (59.4) | 218 (56.8) | 0.738 |
Former | 70 (18.2) | 72 (18.7) | |
Current | 86 (22.4) | 94 (24.5) | |
Pack-years (mean ± SD) | 32.7 ± 25.1 | 30.3 ± 27.7 | 0.209 |
Tumor grade, no. (%) | |||
I | 41 (10.7) | 0 | |
II | 176 (45.8) | 0 | |
III | 86 (22.4) | 0 | |
IV | 81 (21.1) | 0 |