Table 4.
Live birth rate and assisted hatching in propensity-weighted populations with day 3 and day 5 embryo transfer
| Group (sample size) | AH | AH | Rate difference [CI] | P value |
|---|---|---|---|---|
| Day 3 transfer | ||||
| All patients (74,625) | 31.54% | 35.33% | − 0.038 [− 0.045, − 0.03] | < 0.001 |
| Poor prognosis (56,754) | 29.32% | 33.3% | − 0.04 [− 0.048, − 0.031] | < 0.001 |
| Good prognosis (17,871) | 38.2% | 43.57 | − 0.054 [− 0.073, − 0.035] | < 0.001 |
| Day 5 transfer | ||||
| All patients (77,646) | 46.46% | 51.74% | − 0.053 [− 0.063, − 0.043] | < 0.001 |
| Poor prognosis (53,497) | 44.58% | 50.77% | − 0.062 [− 0.074, − 0.05] | < 0.001 |
| Good prognosis (24,149) | 50.8% | 53.92% | − 0.031 [− 0.05, − 0.012] | < 0.001 |
P value < 0.05 denotes a difference in groups; AH, assisted hatching; CI, confidence interval