Table 2 Logistic analysis of factors related to miscarriage
Variable | Miscarriage rate, %(n) | Crude OR (95% CI) | P value | Adjusted OR (95% CI) | P value |
|---|---|---|---|---|---|
Maternal age at oocyte retrieval, y |  | 1.054 (1.016–1.093) | 0.005 | 1.041 (0.991–1.093) | 0.108 |
Paternal age, y |  | 1.046 (1.014–1.079) | 0.005 | 1.012 (0.970–1.056) | 0.582 |
Endometrial thickness, mm |  | 0.923 (0.882–0.965) | < 0.001 | 0.972 (0.924–1.021) | 0.258 |
Cycle type | |||||
 Fresh | 9.3 (153) | 1 |  | 1 |  |
 Frozen | 16.5 (201) | 1.931 (1.542–2.417) | < 0.001 | 1.605 (1.223–2.104) | 0.001 |
Development days of blastocyst | |||||
 Day 5 | 11.3 (292) | 1 |  | 1 |  |
 Day 6 | 21.2 (62) | 2.103 (1.549–2.855) | < 0.001 | 1.519 (1.077–2.144) | 0.017 |
Expansion degree | |||||
 1 + 2 | 15.9 (24) | 1.838 (0.861–3.925) | 0.116 | 2.084 (0.956–4.541) | 0.065 |
 3 | 11.6 (92) | 1.280 (0.663–2.471) | 0.461 | 1.395 (0.712–2.735) | 0.332 |
 4 | 12.5 (227) | 1.392 (0.737–2.630) | 0.308 | 1.608 (0.839–3.082) | 0.153 |
 5 + 6 | 9.3 (11) | 1 |  | 1 |  |
ICM grade | |||||
 A | 11.7 (124) | 1 |  | 1 |  |
 B | 12.7 (230) | 1.104 (0.875–1.394) | 0.404 | 0.859 (0.642–1.149) | 0.306 |
TE grade | |||||
 A | 9.8 (46) | 1 |  | 1 |  |
 B | 11.8 (201) | 1.230 (0.877–1.724) | 0.230 | 1.207 (0.827–1.762) | 0.328 |
 C | 15.3 (107) | 1.659 (1.149–2.396) | 0.007 | 1.509 (0.953–2.389) | 0.079 |