Table 1. Distribution characteristics of 855 renal cell cancer case and 1204 control subjects.
| Cases, no. (%)a | Controls, no. (%)a | |
|---|---|---|
| Age (years) | ||
| 20–39 | 18 (2) | 18 (2) |
| 40–49 | 58 (7) | 72 (6) |
| 50–59 | 185 (21) | 234 (19) |
| 60–69 | 263 (31) | 422 (35) |
| 70–79 | 331 (39) | 458 (38) |
| Body mass index (kg m−2) | ||
| ⩽22.0 | 157 (18) | 287 (24) |
| 22.1–23.5 | 184 (22) | 284 (24) |
| 23.6–24.9 | 187 (22) | 293 (24) |
| >25.0 | 299 (35) | 288 (24) |
| Cigarette smoking | ||
| Never smoked | 381 (45) | 580 (48) |
| ⩽16.7 pack-years | 240 (28) | 310 (26) |
| >16.7 pack-years | 225 (26) | 280 (23) |
| Education (years) | ||
| <10 | 539 (63) | 712 (59) |
| 10–12 | 177 (21) | 241 (20) |
| >12 | 138 (16) | 244 (20) |
| Hypertension | ||
| Ever | 318 (37) | 291 (24) |
| Never | 534 (62) | 909 (75) |
| Diabetes | ||
| Yes | 102 (12) | 65 (5) |
| No | 747 (87) | 1134 (94) |
a
Numbers and percentages do not add up to the total because of missing values for specific variables.