Early miscarriage rate (%) | Single-factor analysis | Multivariate -factor analysis | |||
OR | P | OR | P | ||
Age (years) | |||||
<35 | 12.0 | ||||
35–39 | 16.3 | 1.417 | 0.005 | 1.348 | 0.018 |
≥40 | 35.8 | 4.110 | <0.001 | 3.883 | <0.001 |
BMI (kg/m2) | |||||
18.5–23.9 | 13.9 | ||||
15.3 | 1.117 | 0.611 | 1.873 | 0.389 | |
24–27.9 | 15.2 | 1.107 | 0.446 | 1.391 | 0.681 |
≥28 | 17.9 | 1.353 | 0.103 | 2.067 | 0.062 |
Endometrial thickness (mm) | |||||
<8.5 | 17.3 | ||||
≥8.5 | 13.2 | 0.724 | 0.005 | 0.776 | 0.032 |
Cycle type | |||||
Fresh cycle | 10.1 | ||||
Frozen-thawed cycle | 15.9 | 1.684 | 0.001 | 1.477 | 0.014 |
Embryo type | |||||
Cleavage-stage embryo | 13.8 | ||||
Blastocyst-stage embryo | 15.6 | 1.073 | 0.206 | – | – |
Embryo number | |||||
1 | 18.3 | ||||
2 | 14.0 | 0.729 | 0.026 | 0.762 | 0.065 |
No. of previous miscarriages | |||||
0 | 14.4 | ||||
1 | 14.8 | 1.027 | 0.88 | 0.888 | 0.526 |
2 | 19.4 | 1.421 | 0.282 | 1.123 | 0.735 |
≥3 | 31.3 | 2.692 | 0.068 | 1.772 | 0.308 |