Table 1 Study population characteristics
Cases (n = 68) | Controls (n = 68) | P-value†† | |
|---|---|---|---|
Age at enrollment (years) | |||
Mean (SD) | 60.2 (5.6) | 60.3 (5.7) | 0.966 |
BMI | |||
Mean (SD) | 26.6 (3.1) | 26.3 (3.6) | 0.603 |
Missing | 1 | - | |
Use of oral contraceptives, n (%) | |||
No, but used to in the past | 36 (52.9) | 40 (58.8) | 0.490 |
No, never | 32 (47.1) | 28 (41.2) | |
Duration of oral contraceptives use* (years) | |||
Median (IQR) | 10.0 (4.3-15.8) | 4.5 (2.0-10.0) | 0.018 |
Use of HT, n (%) | |||
No, but used to in the past | 7 (10.3) | 6 (8.8) | 0.771 |
No, never | 61 (89.7) | 62 (91.2) | |
Duration of HT use* (years) | |||
Median (IQR) | 1.0 (1.0-8.0) | 2.0 (1.0-10.0) | 0.273 |
Ovariectomy, n (%) | |||
Both ovaries removed | 5 (7.4) | 3 (4.5) | 0.479 |
Missing | - | 1 | |
Parity, n (%) | |||
Nulliparous | 10 (14.7) | 5 (7.4) | 0.171 |
Number of children † | |||
Median (IQR) | 2.0 (2.0-3.0) | 3.0 (2.0-3.0) | 0.100 |
Smoking, n (%) | |||
No, but used to in the past | 31 (45.6) | 34 (50.0) | 0.607 |
No, never | 37 (54.4) | 34 (50.0) | |
Pack-years smoking until stop date ‡ | |||
Median (IQR) | 7.9 (1.9-16.4) | 4.1 (1.4-10.2) | 0.187 |
Missing | 1 | 3 | |
Alcohol intake (g/day)§ | |||
Median (IQR) | 2.0 (0.2-7.2) | 2.5 (0.2-8.4) | 0.638 |
Use of medicines, minerals or vitamins #, n (%) | |||
Yes | 46 (67.6) | 44 (64.7) | |
No | 22 (32.4) | 24 (35.3) | 0.717 |
Time since last meal and/or drink** (min) | |||
Median (IQR) | 108 (87-137) | 116 (88-137) | 0.651 |