Spontaneous abortion |
0 | 678 | 22,358,387 | 1 | Reference |
1+ | 59 | 1,222,995 | 1.43 | 1.08–1.88 |
Missed abortion |
0 | 702 | 23,090,719 | 1 | Reference |
1+ | 35 | 490,663 | 2.13 | 1.48–2.98 |
Stillbirth |
0 | 727 | 23,508,586 | 1 | Reference |
1+ | 10 | 72,796 | 3.93 | 1.96–6.96 |
Any idiopathic pregnancy loss** |
0 | 651 | 21,917,110 | 1 | Reference |
1 | 54 | 1,382,860 | 1.21 | 0.90–1.61 |
2+ | 32 | 281,412 | 3.50 | 2.38–4.96 |
Test for homogeneity | p < 0.001 |
Trend test | NA |
Time since most recent idiopathic pregnancy loss, yrs |
< 1 | 16 | 180,686 | 2.64 | 1.18–6.29 |
1–2 | 18 | 305,309 | 1.90 | 0.87–4.48 |
3–4 | 16 | 257,888 | 2.05 | 0.92–4.88 |
5–9 | 20 | 474,480 | 1.37 | 0.64–3.17 |
10–14 | 9 | 269,905 | 1 | Reference |
15–19 | 5 | 125,382 | 1.09 | 0.33–3.17 |
20+ | 2 | 50,622 | 1.01 | 0.15–3.98 |
Test for homogeneity | p = 0.21 |
Trend test | p = 0.008 |
Induced abortion |
0 | 590 | 19,731,810 | 1 | Reference |
1 | 111 | 2,855,554 | 1.18 | 0.95–1.45 |
2+ | 36 | 994,018 | 1.08 | 0.75–1.51 |
Test for homogeneity | p = 0.30 |
Trend test | p = 0.23 |
Ectopic pregnancy |
0 | 724 | 23,256,735 | 1 | Reference |
1+ | 13 | 324,647 | 1.06 | 0.58–1.77 |
Hydatidiform mole |
0 | 736 | 23,555,389 | 1 | Reference |
1+ | 1 | 25,993 | 1.09 | 0.06–4.80 |