Table 1.
Characteristics of participants
| Participant characteristic | Unweighted n (%) or mean (± SD) | Weighted n (%) or mean (± SD) |
|---|---|---|
| Age | ||
| 45‐54 | 383 (57.3) | 237 (35.4) |
| 55‐64 | 214 (32.0) | 203 (30.4) |
| >65 | 71 (10.6) | 228 (34.2) |
| Mean (± SD) | 54.7 (± 7.0) | 59 0.0 (± 8.4) |
| Sex (n, % female) | 373 (55.8) | 343 (51.3) |
| Social class | ||
| ABC1 | 500 (74.9) | 501 (75.0) |
| C2DE | 136 (20.4) | 131 (19.6) |
| Missing | 32 (4.8) | 37 (5.5) |
| University level education | 288 (43.1) | 285 (42.7) |
| Ethnicity (n, % White) | 653 (97.8) | 657 (98.4) |
| Self‐reported general health | ||
| Excellent, very good, good | 524 (78.4) | 534 (79.9) |
| Fair, poor | 144 (21.6) | 134 (20.1) |
| Smoking status | ||
| Non‐smoker | 340 (50.9) | 318 (47.6) |
| Ex‐smoker | 236 (35.3) | 257 (38.5) |
| Current smoker | 92 (13.8) | 93 (14.0) |
| BMI (kg/m2) (mean ± SD) | 27.4 (± 5.8) | 27.1 (± 5.3) |
| Missing | 29 (4.3) | 29 (4.3) |
| Previous diagnosis of cancer | 34 (5.1) | 44 (6.6) |
| Family history of kidney cancer | ||
| Yes | 19 (2.8) | 17 (2.6) |
| No | 635 (95.1) | 636 (95.2) |
| Missing | 14 (2.1) | 15 (2.2) |