Table 1. Characteristics of renal cell carcinoma patients from the US Kidney Cancer Study (USKC) and the prostate, lung, colorectal and ovarian cancer (PLCO) screening trial included in LTL and disease-specific survival analyses.
| USKC | PLCO | |
|---|---|---|
| Characteristic | N (%) | N (%) |
| Age | ||
| ⩽59 | 355 (51.9) | 70 (29.0) |
| 60–64 | 112 (16.4) | 83 (34.4) |
| 65–69 | 97 (14.2) | 55 (22.8) |
| ⩾70 | 120 (17.5) | 33 (13.7) |
| Sex | ||
| Male | 390 (57.0) | 169 (70.1) |
| Female | 294 (43.0) | 72 (29.9) |
| Race | ||
| White | 525 (76.8) | 214 (88.8) |
| Black | 159 (23.2) | 15 (6.2) |
| Other | 0 (0.0) | 12 (5.0) |
| Smoking status | ||
| Never | 281 (41.1) | 96 (39.8) |
| Past | 234 (34.2) | 122 (50.6) |
| Current | 169 (24.7) | 23 (9.5) |
| BMI (kg m−2) | ||
| <25 | 133 (19.4) | 49 (20.3) |
| 25–29.9 | 239 (34.9) | 101 (41.9) |
| 30–34.9 | 169 (24.7) | 65 (27.0) |
| ⩾35 | 143 (20.9) | 26 (10.8) |
| Subtype | ||
| Clear cell | 501 (73.2) | |
| Papillary | 93 (13.6) | |
| Chromophobe | 42 (6.1) | |
| Cystic | 36 (5.3) | |
| Other | 12 (1.8) | |
| Tumour size | ||
| ⩽4 cm | 352 (51.5) | |
| 4.1–7 cm | 184 (26.9) | |
| >7 cm | 148 (21.6) | |
| Stage | ||
| I | 473 (69.2) | |
| II | 82 (12.0) | |
| III and IV | 129 (18.9) | |
| Mean (s.d.) | Mean (s.d.) | |
| Telomere length (T/S ratio) | 0.9 (0.2) | 1.4 (0.6) |