Table 1.
Studies from August 2011 to January 2018 and previously missing studies
| Study (English) | Country | IUD type | Max. days to insertion | Efficacy population (n) | Pregnancies (n) | Pregnancy rate (%) (95% CI)a |
|---|---|---|---|---|---|---|
| Turok et al 201415 | USA | TCu-380A | 5 | 173 | 0 | 0 (0–2.11) |
| Turok et al 20163 | USA | TCu-380A | 14b | 66 | 0 | 0 (0–5.43) |
| Akintomide et al 201513 | UK | Cu-unspecified | 5 | 38 | 0 | 0 (0–9.26) |
| Mohammed 201516 | Egypt | TCu-380A | 5 | 174 | 1 | 0.57 (0.1–3.18) |
| Envall et al 201614 | Sweden | Cu-unspecified | Not stated | 36 | 0 | 0 (0–9.74) |
| Kohn et al 201617 | USA | TCu-380A | 5 | 101 | 0 | 0 (0–3.52) |
| (Chinese) | ||||||
| Han 200118 | China | GyneFix | 5 | 126 | 0 | 0 (0–2.83) |
| Wang et al 200019 | China | TCu-380A | 5 | 50 | 0 | 0 (0–7.14) |
| Li et al 201620 | China | Cu-unspecified | 5 | 60 | 0 | 0 (0–5.92) |
| Xu 201321 | China | Cu-gamma | 5 | 414 | 0 | 0 (0–0.89) |
| He 201722 | China | MLCu-375 | 3 | 37 | 0 | 0 (0–9.46) |
| Mei 201723 | China | Cu-unspecified | Not stated | 80 | 1 | 1.25 (0.2–6.71) |
| Wu 201624 | China | MLCu-375 | 3 | 78 | 0 | 0 (0–4.66) |
| Wei 201625 | China | MLCu-375 | 5 | 50 | 0 | 0 (0–7.18) |
| Xu 201626 | China | Cu-gamma 220 | 5 | 60 | 0 | 0 (0–5.94) |
| Zhu 201727 | China | TCu-220 | 5 | 96 | 0 | 0 (0–3.78) |
| Tian 201328 | China | TCu-220, MLCu-375 | 5 | 55 | 0 | 0 (0–6.49) |
| Zhao et al 201529 | China | Cu Y-gong + indomethacin, various sizes | 5 | 26 | 0 | 0 (0–13.23) |
Note: bdata from reference 10 in addition to 3.
Abbreviation: IUD, intrauterine device.