Table 2 Baseline characteristics (mean or %) among colorectal cancer cases and control subjects of Caucasians from the Women's Health Initiative Observational Cohort

Age, year

66.6

66.6

Matched

Body mass index, kg/m²

27.9

26.9

0.001

Family history of colorectal cancer, %

18.7

14.8

0.07

Colonoscopy/sigmoidoscopy exam, %

50.0

57.6

0.01

History of colorectal polyps, %

20.0

19.5

0.89

Hysterectomy, %

35.4

34.9

Matched

Current smoking, %

11.2

10.6

0.82

Current use of E-alone therapy, %

19.7

24.0

0.06

Current use of E+P therapy, %

15.7

21.2

0.06

Physical activity, MET/week

12.4

14.4

0.009

Alcohol intake, drink/day

0.07

never/past

22.2

26.0

<1

38.9

30.8

≥1

38.9

43.2

Total calorie intake, g/day

1437

1556

0.001

Tumor location

colon, N

338

N/A

rectum, N

58

N/A

Tumor stage

Localized, N

183

N/A

Regional, N

152

N/A

Distant, N

61

N/A