Table 2.
Event rate per 100 woman years (range)
| ||||||
---|---|---|---|---|---|---|
Type of IUD | Studies | Subjects followed | Expulsion | Medical removal | Pregnancy | Comments and references |
Mirena® | 1 | 33 | 0 | 0 | 0 | 12 month follow up13 |
MLCu 250 | 1 | 154 | 2.6% | 7.8% | 0 | 12 month percentage rate14 |
TCu 220 | 3 | 714 | (1.78–10.9) | Not stated | 0–1.1 | 12 month cumulative rate15–17 |
TCu 380 | 5 | 314 | (0–17.6) | (0–10.6) | 0 | One study had 6 month follow up only18–22 |
2 | 135 | (4.1–9.6) | 7.2 | 2.4 | aOne reported 6 month cumulative, the other 24 month percentage rates23,24 | |
Metal ring ± catgut knots | 7 | 3131 | (1.2–9.6) | (0.8 – 7.2) | (0–7.5) | aCumulative rate from 6–24 months24,25 |
Notes:
Reference 24 reported 9 Chinese studies also reported in 23 and 25. The data was only used once. Mirena® (Bayer, Wuppertal, Germany); MLCu 250 (Prosan S.A. Arnham, the Netherlands); TCu 380 (Teva Pharmaceutical Industries Ltd., Petach Tikva, Israel); Delta T, Delta loop, Delta Beijing, Metal ring (Chinese government, Beijing, People’s Republic of China).
Abbreviation: IUD, intrauterine device.