Thiery 1980.
| Methods | Location and time frame: Gent, Belgium, from 1976 to 1978 Design: RCT Sample size calculation and outcome of focus: no mention |
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| Participants | General with N: 562 women requesting an IUD Inclusion criteria: no contraindication to IUD use Exclusion criteria: no mention |
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| Interventions | "Immediately after delivery of placenta" Treatment: Multiload 250 IUD Comparison: TCu 200 IUD |
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| Outcomes | Reported pregnancy, expulsion, removal for bleeding or pain, removal for other medical reasons, and continuation Assessment times: gross cumulative event rates shown for 6, 12, and 24 months |
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| Notes | ||
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Unclear risk | "List of randomized numbers" |
| Allocation concealment (selection bias) | Unclear risk | No mention |
| Blinding of participants and personnel (performance bias) All outcomes | Unclear risk | No mention |
| Incomplete outcome data (attrition bias) All outcomes | Low risk | Loss to follow‐up (reported gross cumulative event rates):
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