Table 3.
Pregnancy Outcomes Grouped by the Vaccination Status
| Before PSM | P-value | After PSM | P-value | |||
|---|---|---|---|---|---|---|
| Vaccinated (n = 66) | Unvaccinated (n = 1103) | Vaccinated (n = 66) | Unvaccinated (n = 236) | |||
| No. of embryos transferred, n (%) | 0.126 | 0.093 | ||||
| Single | 24 (36.4) | 305 (27.7) | 24 (36.4) | 61 (25.8) | ||
| Double | 42 (63.6) | 798 (72.3) | 42 (63.6) | 175 (74.2) | ||
| Embryo stage at transfer, n (%) | 0.241 | 0.141 | ||||
| Cleavage | 46 (69.7) | 839 (76.1) | 46 (69.7) | 185 (78.4) | ||
| Blastocyst | 20 (30.3) | 264 (23.9) | 20 (30.3) | 51 (21.6) | ||
| Embryo transfer strategy, n (%) | 0.101 | 0.060 | ||||
| Double cleavage | 40 (60.6) | 787 (71.4) | 40 (60.6) | 174 (73.7) | ||
| Single blastocyst | 18 (27.3) | 253 (22.9) | 18 (27.3) | 50 (21.2) | ||
| Single cleavage | 6 (9.1) | 52 (4.7) | 6 (9.1) | 11 (4.7) | ||
| Double blastocyst | 2 (3.0) | 11 (1.0) | 2 (3.0) | 1 (0.4) | ||
| Biochemical pregnancy rate, n/N (%) | 43/66 (65.2) | 822/1103 (74.5) | 0.092 | 43/66 (65.2) | 174 (73.7) | 0.171 |
| Clinical pregnancy rate, n/N (%) | 39/66 (59.1) | 712/1103 (64.6) | 0.369 | 39/66 (59.1) | 150 (63.6) | 0.507 |
| Implantation rate, n/N (%) | 49/108 (45.4) | 922/1901 (48.5) | 0.527 | 49/108 (45.4) | 192/411 (46.7) | 0.803 |
Note: Data are presented as number (percentage).
Abbreviation: PSM, propensity score matching.