Table 1.
Characteristics of prostate cancer patients and control participants
| Characteristic | Cases (n = 1,605) | Controls (n = 1,697) |
|---|---|---|
| Age at blood collection, years (SD) | 60.2 (6.3) | 60.0 (6.2) |
| Weight, kg (SD)a | 80.2 (11.3) | 80.8 (12.0) |
| Height, cm (SD)a | 173.1 (7.0) | 173.4 (6.9) |
| BMI, kg/m2 (SD)a | 26.7 (3.4) | 26.9 (3.6) |
| Smoking, % (n)a | ||
| Never | 32.7 (513) | 31.3 (513) |
| Former | 44.1 (693) | 41.8 (684) |
| Current | 23.2 (364) | 26.9 (440) |
| Alcohol consumption, % (n)a | ||
| <8 g/day | 34.7 (549) | 36.2 (598) |
| 8–15 g/day | 20.1 (318) | 20.2 (334) |
| 16–39 g/day | 25.6 (405) | 25.6 (423) |
| ≥40 g/day | 19.5 (309) | 18.0 (298) |
| Physical activity, % (n)a | ||
| Inactive | 19.0 (292) | 18.0 (286) |
| Moderately inactive | 32.7 (503) | 31.5 (500) |
| Moderately active/active | 48.4 (745) | 50.5 (801) |
| Marital status, % (n)a | ||
| Married or cohabiting | 89.3 (971) | 89.1 (1,040) |
| Not married or cohabiting | 10.7 (116) | 10.9 (127) |
| Educational attainment, % (n)a | ||
| Primary or equivalent | 37.2 (570) | 38.9 (630) |
| Secondary | 36.8 (564) | 37.2 (602) |
| Degree | 26.1 (400) | 24.0 (388) |
| Cases only | ||
| Time to diagnosis, % (n)b | ||
| <2 years | 11.5 (184) | – |
| 2–<4 years | 18.8 (302) | |
| 4–<6 years | 26.5 (426) | |
| 6–<8 years | 24.4 (392) | |
| ≥8 years | 18.8 (301) | |
| Year of diagnosis, median (range) | 2001 (1994–2006) | – |
| Age at diagnosis, years (SD) | 65.7 (6.3) | – |
| Stage, % (n) | ||
| Localized | 49.4 (792) | – |
| Advanced | 19.7 (316) | – |
| Unknown | 31.0 (497) | – |
| Grade, % (n) | ||
| Low gradec | 58.6 (941) | – |
| High graded | 11.7 (188) | – |
| Unknown | 29.7 (476) | – |
Values are means, except where indicated
aUnknown for some participants; the calculations of percentages exclude missing values
bTime between blood collection and diagnosis among case patients
cGleason score <8 or coded as well or moderately differentiated
dGleason score ≥8 or coded as poorly differentiated or undifferentiated