title: A randomised trial and a comparative study of the copper 7 200 and the multiload copper 250 intrauterine devices.
abstract: A randomized trial of the Copper 7 200 (Cu 7 200) and the Multiload Copper 250 (ML Cu 250) intrauterine devices (IUD) was carried out for 13 months. On life table analysis at 12 months, net cumulative closure rates for use-related terminations (net rates) for the Cu 7 200 were higher than for the ML Cu 250 for accidental pregnancy (NS), expulsions (P less than 0.02) and medical removals for pain and/or bleeding (P less than 0.01). The continuation rate was lower for the Cu 7 200 (P less than 0.001). In a larger comparative study, at 12 months there was a highly significant difference (P less than 0.001) in favour of the ML Cu 250 in accidental pregnancy, expulsions and removals for pain and/or bleeding and continuation of use. Since the ultimate purpose of the use of an IUD is pregnancy protection with a minimum of side effects, the continued use of the Cu 7 200 is not recommended.
mesh_terms: D002986:Clinical Trials as Topic; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007435:Intrauterine Devices, Copper / Q000009:adverse effects / Q000592:standards*; D010298:Parity; D011247:Pregnancy; D011897:Random Allocation