| Methods |
Randomised controlled trial without blinding. Communication with authors indicated use of computer‐generated randomisation sequence |
| Participants |
549 women aged 18 to 40 years in Singapore who were having induced abortions |
| Interventions |
Immediate insertion of Multiload 250 or Multiload 375 |
| Outcomes |
Principal outcome measures included pregnancy, expulsions, removal for bleeding/pain, and other medical reasons |
| Notes |
The report had no a priori hypothesis or sample size and power calculation. Denominators for rates were woman‐months of use |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Random sequence generation (selection bias) |
Low risk |
Communication with authors indicated use of computer‐generated randomisation sequence |
| Allocation concealment (selection bias) |
Low risk |
Pre‐sealed envelopes used |
| Blinding of participants and personnel (performance bias)
All outcomes |
High risk |
No blinding |
| Blinding (performance bias and detection bias)
All outcomes |
High risk |
No blinding |
| Blinding of outcome assessment (detection bias)
All outcomes |
Unclear risk |
No blinding |
| Incomplete outcome data (attrition bias)
All outcomes |
High risk |
No blinding |
| Selective reporting (reporting bias) |
Unclear risk |
Unclear |
| Other bias |
Unclear risk |
The report had no a priori hypothesis or sample size and power calculation. Denominators for rates were woman‐months of use |
