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Table 2 Baseline characteristics of postmenopausal NOWAC Study participants according to total coffee consumption

From: High coffee consumption and different brewing methods in relation to postmenopausal endometrial cancer risk in the Norwegian Women and Cancer Study: a population-based prospective study

Characteristics

Average total coffee consumption, cups per day

 

≤ 1

2-3

4-7

≥ 8

Number of women (%)

15795 (16.1)

32200 (32.9)

36992 (37.8)

12939 (13.2)

Number of EC cases (%)

82 (17.7)

171 (37.1)

177 (37.8)

32 (6.9)

Mean (sd)

Age at enrollment, years

47.5 (8.64)

48,7 (8.73)

47.9 (8.31)

43.7 (6.82)

Age at menarche, years

13.4 (1.45)

13.4 (1.37)

13.3 (1.36)

13.2 (1.39)

Age at first birth, years

24.8 (4.53)

24.4 (4.39)

23.6 (4.17)

22.7 (3.99)

Age at menopause, years

48.1 (5.03)

48.7 (8.74)

48.3 (4.66)

46.9 (4.95)

Duration of OC use, years

2.9 (4.56)

2.6 (4.29)

2.5 (4.12)

2.6 (4.01)

Number of children, %

    0

11.4

9.5

7.9

7.5

    1-2

55.4

53.9

52.6

53.5

    ≥ 3

33.2

36.6

39.5

39.0

Years of total education, %

    < 9

16.6

21.2

28.9

36.7

    10-12

30.2

33.3

36.3

38.3

    13-16

32.5

29.9

24.3

19.3

    > 17

20.8

15.6

10.5

5.9

Smoking status, %

    Current

17.7

21.8

39.3

61.8

    Former

31.1

35.6

31.9

24.6

    Never

51.2

42.6

28.8

13.7

BMI, %

    < 20

10.1

8.1

7.9

10.9

    20-24.9

56.8

58.1

56.7

57.6

    25-29.9

24.3

26.7

28.3

24.8

    ≥ 30

8.8

7.1

7.0

6.8

HRT use, %

    Never

79.7

79.9

83.3

91.1

    Former

8.7

8.4

7.1

3.3

    Current

11.6

11.7

9.7

5.6

Prevalence of diabetes, %

0.98

0.82

0.92

0.98

  1. Abbreviations: NOWAC Norwegian Women and Cancer, EC Endometrial cancer, SD Standard deviation, OC Oral contraceptives, BMI Body mass index, HRT Hormone replacement therapy.
  2. N = 97 926.