Table 1 Characteristics of the initial screened participants
% Of participants | ||||
|---|---|---|---|---|
MMG group (N=4170) | US group (N=4214) | MMG+US group (N=4135) | P-value | |
Age at enrolment, y | 0.99 | |||
Mean±s.d. | 46.3±8.0 | 46.4±8.0 | 46.4±8.0 | |
Age group at enrolment, y | 0.98 | |||
30–39 | 21.2 | 20.9 | 21.0 | |
40–49 | 43.6 | 44.1 | 44.2 | |
50–65 | 35.2 | 35.0 | 34.9 | |
Body mass index | 0.54 | |||
Mean±s.d. | 25.0±2.9 | 25.1±2.9 | 25.1±2.9 | |
Menarche age, y | 0.42 | |||
<14 | 53.8 | 54.9 | 55.2 | |
⩾14 | 46.2 | 45.1 | 44.8 | |
Stress anticipation (0–9) | 0.54 | |||
0 | 6.3 | 6.1 | 6.4 | |
1–4 | 36.1 | 37.2 | 35.4 | |
5–9 | 57.5 | 56.8 | 58.2 | |
Oral contraceptive use | 0.99 | |||
Yes | 13.8 | 13.7 | 13.7 | |
No | 86.2 | 86.3 | 86.3 | |
Menopausal status | 0.66 | |||
Premenopausal | 67.8 | 68.7 | 68.1 | |
Postmenopausal | 32.2 | 31.3 | 31.9 | |
Prior benign breast diseases | 0.70 | |||
Yes | 11.8 | 11.2 | 11.6 | |
No | 88.2 | 88.8 | 88.4 | |
Family history of breast cancer | 0.63 | |||
Yes | 8.2 | 7.6 | 8.0 | |
No | 91.8 | 92.4 | 92.0 | |
Risk score | 0.84 | |||
Mean±s.d. | 39.5±6.2 | 39.6±6.2 | 39.6±6.2 | |
