Table 1.
Individual-level characteristics of cases and controls at recruitment.
| Characteristics | Controls | Cases | ||
|---|---|---|---|---|
| n | % | n | % | |
| Ancestry | ||||
| European | 1686 | 84.6 | 1691 | 87.6 |
| African | 89 | 4.5 | 129 | 6.7 |
| Asian | 72 | 3.6 | 24 | 1.2 |
| Other | 133 | 6.7 | 75 | 3.9 |
| Missing | 14 | 0.7 | 12 | 0.6 |
| First degree relative with history of prostate cancer | ||||
| No | 1738 | 87.2 | 1411 | 73.1 |
| Yes | 196 | 9.8 | 449 | 23.3 |
| Missing | 60 | 3.0 | 71 | 3.7 |
| Timing of past prostate cancer screening (PSA and/or DRE) | ||||
| In the past 2 years | 1511 | 75.8 | 1911 | 99.0 |
| More than 2 years ago | 235 | 11.8 | 1 | 0.1 |
| Never screened | 191 | 9.6 | 3 | 0.2 |
| Do not know | 57 | 2.9 | 16 | 0.7 |
| Education | ||||
| Elementary | 431 | 21.6 | 451 | 23.4 |
| High School | 576 | 28.9 | 573 | 29.7 |
| College | 375 | 18.8 | 313 | 16.2 |
| University | 610 | 30.6 | 589 | 30.5 |
| Missing | 2 | 0.1 | 5 | 0.3 |
| Annual family income at index date (Canadian dollars) | ||||
| <20,000$ | 245 | 12.3 | 225 | 11.7 |
| 20,000–29,999$ | 252 | 12.6 | 264 | 13.7 |
| 30,000–49,999$ | 462 | 23.2 | 448 | 23.2 |
| 50,000–79,999$ | 410 | 20.6 | 423 | 21.9 |
| 80,000$ and more | 428 | 21.5 | 424 | 22.0 |
| Missing | 197 | 9.9 | 147 | 7.6 |
| Marital status | ||||
| Married or common law | 1503 | 75.4 | 1426 | 73.9 |
| Separated or divorced | 249 | 12.5 | 256 | 13.3 |
| Single | 151 | 7.6 | 164 | 8.5 |
| Widower | 83 | 4.2 | 73 | 3.8 |
| Religious order | 7 | 0.4 | 12 | 0.6 |
| Missing | 1 | 0.1 | 0 | 0.0 |
| Number of children | ||||
| 0 | 327 | 16.4 | 347 | 18.0 |
| 1 | 296 | 14.8 | 303 | 15.7 |
| 2 | 712 | 35.7 | 674 | 34.9 |
| ≥3 | 658 | 33.0 | 607 | 31.4 |
| Missing | 1 | 0.1 | 0 | 0.0 |
| Number of siblings | ||||
| 0 | 79 | 4.0 | 64 | 3.3 |
| 1-2 | 495 | 24.8 | 459 | 23.8 |
| 3-4 | 497 | 24.9 | 506 | 26.2 |
| ≥5 | 890 | 44.6 | 876 | 45.4 |
| Missing | 33 | 1.7 | 26 | 1.4 |
| Number of persons living with the subject 2 years before the index date | ||||
| 0 | 320 | 16.1 | 316 | 16.4 |
| 1 | 1108 | 55.6 | 1143 | 59.2 |
| 2 | 258 | 12.9 | 237 | 12.3 |
| ≥3 | 306 | 15.3 | 233 | 12.1 |
| Missing | 2 | 0.1 | 2 | 0.1 |
| Mean | SD | Mean | SD | |
|---|---|---|---|---|
| Age at index date (years) | 64.8 | 6.9 | 63.6 | 6.8 |
| Body mass index (kg/m2) | 27.2 | 4.4 | 26.8 | 4.0 |
| Smoking (pack-years) | 18.8 | 21.9 | 17.6 | 21.4 |
| Alcohol intake (drink-years) | 73.4 | 136.2 | 72.9 | 119.8 |
| Daily frequency of fruits and vegetables consumption | 4.5 | 2.1 | 4.4 | 2.1 |
PROtEuS, Montreal, Canada, 2005–2012.