Table 3.
Results of the logistic regression model.
| Risk factor | Regression coefficient | Standard error | Wald chi-square value | P value | OR |
|---|---|---|---|---|---|
| Gestational sac in relation to the scar | 1.599 | 0.827 | 3.739 | 0.053 | 4.946 |
| Trophoblastic blood flow | 6.051 | 0.049 | |||
| Type Ia | 1.846 | 1.126 | 2.685 | 0.101 | 6.332 |
| Type IIb | 2.048 | 0.837 | 5.993 | 0.014 | 7.755 |
| Thickness of the residual muscle | -0.755 | 0.309 | 5.967 | 0.015 | 0.470 |
| Constant | -1.900 | 1.992 | 0.909 | 0.340 | 0.150 |
aComparison between the trophoblastic blood from the lower posterior uterus and unknown; bcomparison between the trophoblastic blood from the lower posterior uterus and the lower anterior uterus.