Table 3.
Comparison of reproductive outcomes.
| Before PSM | After PSM | |||||||
|---|---|---|---|---|---|---|---|---|
| Group A | Group B | χ2/t | P | Group A | Group B | χ2/t | P | |
| Implantation | 42.47% (285/671) | 41.53% (699/1683) | 0.175 | 0.676 | 42.56% (283/665) | 40.38% (294/728) | 0.676 | 0.411 |
| Biochemical pregnancy | 4.01% (20/499) | 4.76% (58/1219) | 0.460 | 0.498 | 4.04% (20/495) | 5.13% (27/526) | 0.693 | 0.405 |
| Clinical pregnancy | 51.70% (258/499) | 50.29% (613/1219) | 0.284 | 0.594 | 51.72% (256/495) | 49.43% (260/526) | 0.534 | 0.465 |
| Miscarriage | 13.19% (34/258) | 12.89% (79/613) | 0.014 | 0.907 | 12.89% (33/256) | 11.54 (30/260) |
0.220 | 0.639 |
| Live birth | 43.09% (215/499) | 42.33% (516/1219) | 0.083 | 0.773 | 43.23% (214/495) | 41.63% (219/526) | 0.266 | 0.903 |
| Multiple pregnancy | 12.02% (31/258) | 15.01% (92/613) | 1.341 | 0.247 | 12.11% (31/256) | 13.85% (36/260) | 0.344 | 0.557 |
| Birth weight of newborns (kg) | 3.00 ± 0.53 | 3.00 ± 0.53 | 0.078 | 0.938 | 3.00 ± 0.53 | 3.00 ± 0.52 | -0.546 | 0.585 |
| Birth height of newborns (cm) | 49.07 ± 2.66 | 48.95 ± 2.63 | 0.529 | 0.597 | 49.09 ± 2.65 | 49.15 ± 2.74 | -0.258 | 0.797 |
| Malformation of newborns | 0.93% (2/215) |
0.78% (4/516) |
/ | 1.000 | 0.93% (2/214) |
0.91% (2/219) |
/ | 1.000 |
| Moderate/severe OHSS rate | 3.57% (33/924) | 2.87% (57/1984) | 1.025 | 0.311 | 3.61% (33/915) | 2.51% (23/915) | 1.622 | 0.203 |
PSM, propensity score matching; OHSS, ovarian hyper-stimulation syndrome.