Table 3.
Changes in mean age at first birth, the frequency of miscarriage and mean age at menopause in women from Eastern China
| age group |
Age at first birth (years) |
Times of miscarriage |
Age at menopause |
||||||
|---|---|---|---|---|---|---|---|---|---|
| number | mean ± SD | P value* | number | mean ± SD | P value* | number | mean ± SD | P value* | |
| 25-34 |
27226 |
22.38 ± 7.73 |
|
27164 |
0.29 ± 0.65 |
|
|
|
|
| 35-44 |
40832 |
24.36 ± 3.54 |
|
40777 |
0.42 ± 0.77 |
|
|
|
|
| 45-54 |
27092 |
24.39 ± 2.94 |
<0.001 |
27065 |
0.45 ± 0.83 |
<0.001 |
9955 |
47.92 ± 4.60 |
|
| 55-64 |
19641 |
23.95 ± 3.50 |
|
19626 |
0.27 ± 0.65 |
|
18118 |
49.28 ± 4.29 |
<0.001 |
| 65-70 |
7105 |
23.04 ± 4.00 |
|
7098 |
0.22 ± 0.61 |
|
6724 |
48.71 ± 4.62 |
|
| total |
121896 |
23.75 ± 4.80 |
|
121730 |
0.36 ± 0.74 |
|
34797 |
48.63 ± 4.82 |
|
| loss value | 162 | 328 | 1506 | ||||||
*Statistical analysis was performed using ANOVA