Table 2.
Baseline characteristics of postmenopausal NOWAC Study participants according to total coffee consumption
|
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 |
Abbreviations: NOWAC Norwegian Women and Cancer, EC Endometrial cancer, SD Standard deviation, OC Oral contraceptives, BMI Body mass index, HRT Hormone replacement therapy.
N = 97 926.