Table 1 Baseline characteristics of participants.

From: Association of 25-hydroxyvitamin D with risk of overall and colorectal cancer among Japanese using a Mendelian randomization approach

Phenotypes

Study

Source

Total (n)

Men (%)

Age mean (SD)

Crude mean (SD) (ng/mL)

Exposure

 Vitamin D

JPHC-base

Population-based cohort

3739

34.0

53.8 (7.8)

22.0 (7.1)

 Vitamin D

J-MICC

Population-based cohort

239

25.1

58.5 (9.7)

18.0 (5.1)

Outcome

Study

Source

Case/Control (n)

Men (%)

Age Mean (SD) among case

Age Mean (SD) among control

Total cancer

JPHC-base

Population-based cohort

3541/10,536

54.1/35.1

56.8 (7.5)

53.9 (7.9)

Total cancer

JPHC-5 year

Population-based cohort

1002/3688

61.1/41.7

55.2 (6.8)

52.9 (7.4)

All (total cancer)

  

4543/14,224

   

Colorectal cancer

JPHC-base

Population-based cohort

482/2434

51.0/35.0

57 (7.3)

53.8 (7.9)

Colorectal cancer

JPHC-5 year

Population-based cohort

194/3607

57.7/41.4

55.5 (6.8)

52.8 (7.4)

Colorectal cancer

J-MICC

Population-based cohort

300/901

62.0/49.4

60.0 (6.5)

55.4 (10.0)

Colorectal cancer

NAGANO

Hhospital-based case–control

105/103

62.9/63.1

59.4 (9.0)

59.2 (8.8)

Colorectal cancer

HERPACC

Hospital-based case–control

163/3819

63.2/49.5

59.4 (10.1)

52.1 (12.2)

Colorectal cancer

BBJ

Hospital-based case–control

6692/27,178

63.7/39.3

66.9 (10.1)

60.7 (10.0)

All (Colorectal cancer)

  

7936/38,042

   
  1. JPHC Japan public health center-based prospective, J-MICC Japan multi-institutional collaborative cohort, HERPACC Hospital-based epidemiologic research program at aichi cancer center, BBJ BioBank Japan.