Table 2.
Distribution of selected categorical risk factors for incident prostate cancer and associated age-adjusted ORs and 95% CIs, Montreal, Canada, 2005 to 2012.
| Cases (N = 1,172) | Controls (N = 1,177) | |||||
|---|---|---|---|---|---|---|
| Number | % | Number | % | Age-adjusted OR | 95% CI | |
| Annual family income | ||||||
| <$20,000 | 165 | 14.08 | 174 | 14.78 | 1 | |
| $20,000 to $29,999 | 177 | 15.10 | 164 | 13.93 | 1.16 | 0.86, 1.57 |
| $30,000 to $49,999 | 268 | 22.87 | 276 | 23.45 | 1.00 | 0.76, 1.32 |
| $50,000 to $79,999 | 224 | 19.11 | 220 | 18.69 | 1.03 | 0.78, 1.37 |
| $80,000 and more | 240 | 20.48 | 239 | 20.31 | 0.95 | 0.72, 1.27 |
| Other (prefer not to respond, do not know) | 98 | 8.36 | 104 | 8.84 | 1.00 | 0.71, 1.42 |
| Ancestry | ||||||
| European | 999 | 85.24 | 971 | 82.50 | 1 | |
| Black | 96 | 8.19 | 63 | 5.35 | 1.44 | 1.03, 2.00 |
| Asian | 13 | 1.11 | 43 | 3.65 | 0.29 | 0.16, 0.55 |
| Other | 54 | 4.61 | 91 | 7.73 | 0.56 | 0.40, 0.80 |
| Do not know | 10 | 0.85 | 9 | 0.76 | 1.05 | 0.42, 2.59 |
| Highest level of schooling | ||||||
| Elementary school | 284 | 24.23 | 249 | 21.16 | 1 | |
| High school | 359 | 30.63 | 327 | 27.78 | 0.90 | 0.72, 1.13 |
| College | 166 | 14.16 | 192 | 16.31 | 0.68 | 0.52, 0.90 |
| University | 361 | 30.80 | 408 | 34.66 | 0.70 | 0.56, 0.88 |
| Other (do not know or missing) | 2 | 0.17 | 1 | 0.08 | 1.96 | 0.18, 21.78 |
| First-degree relative with history of prostate cancer | ||||||
| No | 880 | 75.09 | 1,024 | 87.00 | 1 | |
| Yes | 252 | 21.50 | 117 | 9.94 | 2.51 | 1.98, 3.18 |
| Do not know | 40 | 3.41 | 36 | 3.06 | 1.26 | 0.80, 2.00 |
| Frequency of fruit and vegetable consumption | ||||||
| <6 | 291 | 24.83 | 305 | 25.91 | 1 | |
| >6 and <9 | 335 | 28.58 | 305 | 25.91 | 1.16 | 0.92, 1.45 |
| >9 and <12 | 273 | 23.29 | 292 | 24.81 | 0.97 | 0.77, 1.23 |
| > 12 | 265 | 22.61 | 272 | 23.11 | 1.01 | 0.80, 1.28 |
| Do not know or missing | 8 | 0.68 | 3 | 0.25 | 2.89 | 0.76, 11.04 |
| Diabetes | ||||||
| No | 1,003 | 85.58 | 950 | 80.71 | 1 | |
| Yes | 166 | 14.16 | 226 | 19.20 | 0.72 | 0.58, 0.90 |
| Do not know or missing | 3 | 0.26 | 1 | 0.08 | 2.83 | 0.29, 27.33 |
| Physical activity | ||||||
| Not very active | 285 | 24.32 | 354 | 30.08 | 1 | |
| Moderately active | 269 | 22.95 | 272 | 23.11 | 1.23 | 0.98, 1.55 |
| Very active | 613 | 52.30 | 550 | 46.73 | 1.43 | 1.18, 1.74 |
| Do not know or missing | 5 | 0.43 | 1 | 0.08 | 7.13 | 0.83, 61.45 |
| Timing of the last prostate cancer screening by prostate specific antigen or digital rectal examination | ||||||
| Within last 2 years | 1,160 | 98.97 | 871 | 74.00 | NA | |
| 2–5 years earlier | 1 | 0.09 | 98 | 8.33 | NA | |
| >5 years earlier | 0 | 0.00 | 47 | 3.99 | NA | |
| Never screened | 1 | 0.09 | 134 | 11.39 | NA | |
| Do not know | 10 | 0.85 | 27 | 2.29 | NA | |
| Gleason score | ||||||
| <6 (low grade) | 837 | 71.41 | NA | NA | ||
| >7 (high grade) | 334 | 28.50 | NA | NA | ||
| Missing | 1 | 0.09 | NA | NA |