Table 1.
Sociodemographic Characteristics of Cases and Controls in a Study of Night-Shift Work and Risk of Prostate Cancer, PROtEuS, Montreal, Quebec, Canada, 2005–2012
| Characteristic | Prostate Cancer Cases (n = 1,904) | Controls (n = 1,965) | ||
|---|---|---|---|---|
| No. | % | No. | % | |
| Age group, years | ||||
| <65 | 989 | 51.9 | 878 | 44.7 |
| ≥65 | 915 | 48.1 | 1,087 | 55.3 |
| Mean age, yearsa | 63.6 (6.8) | 64.9 (6.9) | ||
| Ancestry | ||||
| Sub-Saharan African | 129 | 6.8 | 89 | 4.6 |
| Asian | 24 | 1.3 | 72 | 3.7 |
| French | 1,422 | 75.2 | 1,224 | 62.6 |
| Other European | 243 | 12.8 | 434 | 22.3 |
| Greater Middle Eastern | 45 | 2.4 | 99 | 5.1 |
| Latino | 28 | 1.5 | 31 | 1.5 |
| Other | 1 | 0.1 | 3 | 0.2 |
| Educational level | ||||
| Primary school or less | 442 | 23.2 | 421 | 21.4 |
| High school | 569 | 29.9 | 570 | 29.0 |
| College (2–3 years post–high school) | 308 | 16.2 | 368 | 18.7 |
| University degree | 580 | 30.5 | 604 | 30.7 |
| Other | 5 | 0.3 | 2 | 0.1 |
| First-degree family history of prostate cancer | ||||
| No | 1,396 | 76.1 | 1,717 | 90.0 |
| Yes | 439 | 23.9 | 190 | 10.0 |
Abbreviation: PROtEuS, Prostate Cancer and Environment Study.
a Values are expressed as mean (standard deviation).