Table 3.
Subgroup analysis of ongoing pregnancy.
| Subgroups | RR | 95% CI | |
|---|---|---|---|
| Frozen embryo transfer | HRT | 1.19 | 0.85,1.68 |
| NC | 1.85 | 0.44,7.84 | |
| Design | Prospective cohort | 1.27 | 0.60,2.68 |
| Retrospective cohort | 1.18 | 0.94,1.47 | |
| Change ratio | 0% | 1.74 | 0.84,3.57 |
| 5% | 1.24 | 0.86,1.80 | |
| 10% | 1.42 | 0.99,2.02 | |
| 15% | 1.99 | 1.61,2.47 | |
| 20% | 1.77 | 1.27,2.47 | |
| Measurement | TVUS | 1.03 | 0.84,1.27 |
| TVUS+AUS | 1.69 | 1.26,2.26 |
HRT, hormone replacement therapy; NC, natural cycles; TVUS, transvaginal ultrasonography; AUS, abdominal ultrasonography; RR, risk ratio; CI, confidence interval.