Skip to main content

Table 1 Selected characteristics of cases and controls

From: Occupation, industry, and the risk of prostate cancer: a case-control study in Montréal, Canada

Variable Controls (n = 1994) Cases
All (n = 1937) Low gradea (n = 1405) High gradeb (n = 524)
Age at diagnosis or interview in years, n (%)
  < 60 446 (22.4) 523 (27.0) 414 (29.5) 107 (20.4)
  ≥ 60 and <65 450 (22.6) 486 (25.1) 351 (25.0) 131 (25.0)
  ≥ 65 and <70 522 (26.2) 498 (25.7) 347 (24.7) 150 (28.6)
  ≥ 70 and ≤75 576 (28.9) 430 (22.2) 293 (20.9) 136 (26.0)
Ancestry, n (%)
 European 1685 (84.5) 1696 (87.6) 1234 (87.8) 455 (86.8)
 Sub-Saharan 90 (4.5) 130 (6.7) 99 (7.0) 30 (5.7)
 Asian 73 (3.7) 24 (1.2) 15 (1.1) 9 (1.7)
 Greater Middle East 99 (5.0) 45 (2.3) 32 (2.3) 13 (2.5)
 Other 33 (1.7) 30 (1.5) 18 (1.3) 12 (2.3)
 Don’t know 14 (0.7) 12 (0.6) 7 (0.5) 5 (1.0)
First-degree family history of PCa, n (%)
 No 1739 (87.2) 1419 (73.3) 1008 (71.7) 405 (77.3)
 Yes 199 (10.0) 452 (23.3) 351 (25.0) 100 (19.1)
 Don’t know 56 (2.8) 66 (3.4) 46 (3.3) 19 (3.6)
Date of last screening for PCa before diagnosis or interview, n (%)
  ≤ 2 years 1510 (75.7) 1917 (99.0) 1388 (98.8) 521 (99.4)
  > 2 years 235 (11.8) 1 (0.1) 1 (0.1) 0 (0.0)
 No/Never 191 (9.6) 3 (0.2) 2 (0.1) 1 (0.2)
 Don’t know 58 (2.9) 16 (0.8) 14 (1.0) 2 (0.4)
Annual household income in CAD$, n (%)
  < 10,000–29,999 497 (24.9) 490 (25.3) 323 (23.0) 167 (31.9)
 30,000–79,999 872 (43.8) 874 (45.1) 640 (45.6) 228 (43.5)
 80,000 and more 428 (21.5) 426 (22.0) 343 (24.4) 81 (15.5)
 Prefers not to respond 186 (9.3) 132 (6.8) 91 (6.5) 41 (7.8)
 Don’t know 9 (0.5) 15 (0.8) 8 (0.6) 7 (1.3)
Highest level of education attained, n (%)
 Primary 428 (21.5) 449 (23.2) 312 (22.2) 136 (26.0)
 Secondary/College 953 (47.8) 891 (46.0) 629 (44.8) 259 (49.5)
 University 611 (30.7) 592 (30.6) 461 (32.8) 127 (24.3)
 Don’t know 1 (0.1) 4 (0.2) 3 (0.2) 1 (0.2)
Self-reported level of physical activity at work or leisure, n (%)
 Not very active 151 (7.6) 127 (6.6) 84 (6.0) 43 (8.2)
 Moderately active 753 (37.8) 682 (35.2) 516 (36.7) 160 (30.5)
 Very active 1089 (54.6) 1128 (58.2) 805 (57.3) 321 (61.3)
Cigarette pack-years, n (%)
 Zero 544 (27.3) 542 (28.0) 404 (28.8) 136 (26.0)
  > 0–15.1 441 (22.1) 498 (25.7) 381 (27.1) 114 (21.8)
  > 15.1–39.4 524 (26.3) 420 (21.7) 296 (21.1) 122 (23.3)
  > 39.4–223 474 (23.8) 458 (23.6) 313 (22.3) 144 (27.5)
 Don’t know 11 (0.6) 19 (1.0) 11 (0.8) 8 (1.5)
Alcohol drink-years, n (%)
 Zero 231 (11.6) 214 (11.0) 157 (11.2) 56 (10.7)
  > 0–24.4 575 (28.8) 548 (28.3) 413 (29.4) 133 (25.4)
  > 24.4–76 569 (28.5) 553 (28.5) 408 (29.0) 143 (27.3)
  > 76–2660 577 (28.9) 545 (28.1) 376 (26.8) 166 (31.7)
 Don’t know 42 (2.1) 77 (4.0) 51 (3.6) 26 (5.0)
Body-mass index, 2 years before diagnosis or interview, in kg/m2, n (%)
  ≤ 24.2 477 (23.9) 502 (25.9) 362 (25.8) 137 (26.2)
  > 24.2–26.5 492 (24.7) 512 (26.4) 373 (26.5) 137 (26.2)
  > 26.5–29.2 477 (23.9) 479 (24.7) 362 (25.8) 116 (22.2)
  > 29.2 535 (26.8) 431 (22.3) 299 (21.3) 130 (24.9)
 Don’t know 13 (0.7) 12 (0.6) 9 (0.6) 3 (0.6)
  1. aGleason score ≤6 or 3 + 4
  2. bGleason score ≥8 or 4 + 3