Table 4 Sensitivity analyses for the association between leisure-time sunlight exposure and prostate cancer, PROtEuS, Montreal, Canada

Excluding proxy respondents

1854

(100)

1889

(100)

 CEvents ^b

  None: 0 event

55

(3.0)

46

(2.4)

1.45 (0.89-2.38)

  Q1: 1 to 3,210 events

490

(26.4)

456

(24.1)

1.13 (0.91-1.40)

  Q2: 3,211 to 6,642 events

431

(23.2)

463

(24.5)

0.94 (0.76-1.16)

  Q3: 6,643 to 13,679 events

464

(25.0)

460

(24.4)

1.01 (0.82-1.24)

  Q4: 13,680 to 94,886.67 events

414

(22.3)

464

(24.6)

1.00 (reference)

p-trend =0.52

 CDuration ^c

  None: 0 hour

55

(3.0)

46

(2.4)

1.52 (0.94-2.50)

  Q1: 1 to 4,497 hours

466

(25.1)

457

(24.2)

1.14 (0.91-1.42)

  Q2: 4,498 to 9,711 hours

459

(24.8)

465

(24.6)

1.01 (0.82-1.25)

  Q3: 9,712 to 18,459 hours

480

(25.9)

457

(24.2)

1.18 (0.96-1.46)

  Q4: 18,460 to 103,484 hours

394

(21.3)

464

(24.6)

1.00 (reference)

p-trend =0.35

Excluding controls not screened for prostate cancer

1904

(100)

1491

(100)

 CEvents ^b

  None: 0 event

55

(2.9)

34

(2.3)

1.39 (0.86-2.27)

  Q1: 1 to 3,210 events

506

(26.6)

336

(22.5)

1.12 (0.91-1.39)

  Q2: 3,211 to 6,642 events

438

(23.0)

373

(25.0)

0.88 (0.72-1.09)

  Q3: 6,643 to 13,679 events

474

(24.9)

374

(25.1)

1.03 (0.84-1.26)

  Q4: 13,680 to 94,886.67 events

431

(22.6)

374

(25.1)

1.00 (reference)

p-trend =0.56

 CDuration ^c

  None: 0 hour

55

(2.9)

34

(2.3)

1.49 (0.92-2.45)

  Q1: 1 to 4,497 hours

483

(25.4)

339

(22.7)

1.18 (0.95-1.46)

  Q2: 4,498 to 9,711 hours

467

(24.5)

370

(24.8)

1.00 (0.81-1.23)

  Q3: 9,712 to 18,459 hours

489

(25.7)

365

(24.5)

1.19 (0.97-1.46)

  Q4: 18,460 to 103,484 hours

410

(21.5)

383

(25.7)

1.00 (reference)

p-trend =0.32

Excluding subjects without information for number of months per year of leisure activities

1611

(100)

1766

(100)

 CEvents ^b

  None: 0 event

55

(3.4)

52

(2.9)

1.48 (0.92-2.41)

  Q1: 1 to 3,210 events

428

(26.6)

428

(24.2)

1.17 (0.93-1.47)

  Q2: 3,211 to 6,642 events

381

(23.6)

434

(24.6)

0.97 (0.78-1.21)

  Q3: 6,643 to 13,679 events

396

(24.6)

414

(23.4)

1.07 (0.86-1.32)

  Q4: 13,680 to 94,886.67 events

351

(21.8)

438

(24.8)

1.00 (reference)

p-trend =0.41

 CDuration ^c

  None: 0 hour

55

(3.4)

52

(2.9)

1.55 (0.96-2.52)

  Q1: 1 to 4,497 hours

397

(24.6)

429

(24.3)

1.12 (0.89-1.42)

  Q2: 4,498 to 9,711 hours

407

(25.3)

428

(24.2)

1.09 (0.87-1.36)

  Q3: 9,712 to 18,459 hours

426

(26.4)

428

(24.2)

1.24 (0.99-1.54)

  Q4: 18,460 to 103,484 hours

326

(20.2)

429

(24.3)

1.00 (reference)

p-trend =0.30

Considering winter leisure activities considered as non-exposed

1904

(100)

1962

(100)

 CEvents ^b

  None: 0 event

60

(3.2)

54

(2.8)

1.47 (0.93-2.35)

  Q1: 1 to 2,173 events

499

(26.2)

477

(24.3)

1.19 (0.96-1.48)

  Q2: 2,174 to 4,560 events

430

(22.6)

477

(24.3)

0.97 (0.79-1.20)

  Q3: 4,561 to 9,103 events

525

(27.6)

477

(24.3)

1.24 (1.01-1.52)

  Q4: 9,104 to 52,991.5 events

390

(20.5)

477

(24.3)

1.00 (reference)

p-trend =0.34

 CDuration ^c

  None: 0 hour

60

(3.2)

54

(2.8)

1.38 (0.87-2.20)

  Q1: 1 to 2,987 hours

455

(23.9)

477

(24.3)

1.03 (0.83-1.28)

  Q2: 2,988 to 6,790 hours

474

(24.9)

477

(24.3)

1.01 (0.82-1.24)

  Q3: 6,791 to 12,479 hours

492

(25.8)

476

(24.3)

1.14 (0.93-1.40)

  Q4: 12,480 to 94,933 hours

423

(22.2)

478

(24.4)

1.00 (reference)

p-trend =0.46

Using self-reported recreational sunlight exposure

1904

(100)

1962

(100)

  None

105

(5.5)

117

(6.0)

0.98 (0.71-1.37)

  Sometimes

708

(37.2)

804

(41.0)

0.91 (0.79-1.06)

  Often

1091

(57.3)

1041

(53.1)

1.00 (reference)