Table 1 Characteristics of the Study Population
From: Risk of urinary bladder cancer: a case-control analysis of industry and occupation
| Â | Case | Control | Â |
|---|---|---|---|
Characteristic | (N = 604) | (N = 604) | PValue |
Gender, N (%) | Â | Â | Â |
   Male | 464 (76.8) | 464 (76.8) |  |
   Female | 140 (23.2) | 140 (23.2) | 0.99 |
Smoking status, N (%) | Â | Â | Â |
   Never | 163 (27.0) | 282 (46.7) |  |
   Former | 279 (46.2) | 277 (45.9) |  |
   Current | 162 (26.8) | 45 (7.5) | <0.0001 |
   Ever | 441 (73.0) | 322 (53.3) | <0.0001 |
Pack-year, mean (SD) | 43.14 (30.5) | 28.81 (27.7) | <0.0001 |
Age, mean (SD) | 63.64 (11.0) | 63.02 (10.5) | 0.99 |