Table 1 Population characteristics, including the proportion of subjects recruited from each region in Eastern China, the location, age at menarche, the frequency of full-term births and miscarriages, and the proportion of pre- and post-menopausal women
Characteristics | Participants | Proportion (%) |
|---|---|---|
Regions | ||
Shandong | 61104 | 50.06 |
Jiangsu | 20921 | 17.14 |
Hebei | 19741 | 16.17 |
Tianjin | 20292 | 16.62 |
Loss value | 0 | |
Location | ||
Urban | 33696 | 27.61 |
Rural | 88362 | 72.39 |
Loss value | 0 | |
Age of menarche | ||
7-11 | 867 | 7.10 |
12-13 | 19395 | 15.89 |
14 or more | 101744 | 83.36 |
Loss value | 52 | |
Frequency full-term gestation | ||
<2 | 70719 | 57.94 |
> = 2 | 51339 | 42.06 |
Loss value | 0 | |
Number of miscarriages | ||
0 | 91433 | 74.91 |
1 | 20632 | 16.90 |
2 | 7398 | 6.06 |
>2 | 2427 | 1.99 |
Loss value | 168 | |
Menopausal status | ||
Pre-menopause | 85755 | 70.26 |
Post-menopause | 36303 | 29.74 |
Loss value | 0 |