GRADE summary of findings table for the critical outcomes
| Quality assessment | Patients (n) | Effect | Quality | ||||||||
| Studies (n) | Design | Risk of bias | Inconsistency | Indirectness | Imprecision | Other considerations | Simultaneous | Delayed | Relative risk (RR (95% CI)) | Absolute | |
| Ongoing pregnancy | |||||||||||
| 3 | RCTs | Serious* | No serious inconsistency | No serious indirectness | Very serious† | None | 4/694 (0.58%) | 2/686 (0.29%) | 1.78 (0.38 to 8.36) | 2 more per 1000 (from 2 fewer to 21 more) | Very low |
| Haemorrhage requiring transfusion or 500 mL blood loss or above | |||||||||||
| 3 | RCTs | Serious*‡ | No serious inconsistency | No serious indirectness | Very serious§ | None | 0/694 (0%) | 4/686 (0.58%) | 0.11 (0.01 to 2.03) | 5 fewer per 1000 (from 6 fewer to 6 more) | Very low |
| Patient satisfaction (“Would choose same method again”) | |||||||||||
| 1 | RCTs | Serious¶ | No serious inconsistency | No serious indirectness | No serious imprecision | None | 480/545 (88.1%) | 477/536 (89%) | 0.99 (0.95 to 1.03) | 9 fewer per 1000 (from 44 fewer to 27 more) | Moderate |
| Patient satisfaction (“Would recommend to friend”) | |||||||||||
| 1 | RCTs | Serious¶ | No serious inconsistency | No serious indirectness | No serious imprecision | None | 512/545 (93.9%) | 504/536 (94%) | 1.00 (0.97 to 1.03) | 0 fewer per 1000 (from 28 fewer to 28 more) | Moderate |
| Patient satisfaction (“Satisfied with procedure and would like to use this method again”) | |||||||||||
| 1 | RCTs | Serious¶** | No serious inconsistency | No serious indirectness | No serious imprecision | None | 39/40 (97.5%) | 38/40 (95%) | 1.03 (0.94 to 1.12) | 28 more per 1000 (from 57 fewer to 114 more) | Moderate |
*Unclear randomisation sequence generation and/or allocation concealment adequacy in two of the three studies.
†The CI crosses 0.8 and 1.25.
‡All three studies were unblinded.
§The event rate <150.
¶Unblinded study.
**Unclear adequacy of allocation concealment.
RCT, randomised controlled trial.