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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