Table 1.
Characteristics of prostate cases and controls in the Janus cohort.
| Characteristic | Cases (n = 150) | Controls (n = 314) |
|---|---|---|
| Age at enrollment (mean ± SD) | 43.8 ± 3.8 | 42.0 ± 6.2 |
| Year of enrollment/collection [n (%)] | ||
| 1972–1974 | 78 (52.0) | 171 (54.5) |
| 1975–1978 | 72 (48.0) | 143 (45.5) |
| Body mass index [kg/m2; n (%)] | ||
| < 25 | 83 (55.3) | 169 (53.8) |
| 25–29 | 60 (40.0) | 130 (41.4) |
| ≥ 30 | 7 (4.7) | 15 (4.8) |
| Cigarette smoking status [n (%)] | ||
| Never | 26 (17.3) | 58 (18.5) |
| Former | 36 (24.0) | 63 (20.1) |
| Current | 73 (48.7) | 163 (51.9) |
| Missing | 15 (10.0) | 30 (9.6) |
| Age at diagnosis (mean ± SD) | 63.1 ± 5.3 | — |
| Years from blood draw to diagnosis (mean ± SD) | 17.8 ± 6.7 | 20.3 ± 4.9a |
| Tumor grade [n (%)] | ||
| Well differentiated | 5 (3.3) | — |
| Moderately differentiated | 66 (44.0) | — |
| Poorly differentiated | 48 (32.0) | — |
| Unknown | 31 (20.7) | — |
| aDefined as time from blood draw to matched case’s diagnosis date. | ||