Intrauterine contraception with Nova-T and copper | 合法醫療器材資訊網

由KGNygren著作·1981·被引用20次—Nova-ThadsuperioreffectivenessinpreventingundesiredpregnancieswhencomparedwithCopper-T.TheperformanceofNova-Tislessaffectedbyageandparity ...

A randomized comparative trial on the clinical performance of two copper-releasing IUDs (Nova-T and Copper-T-200) was performed simultaneously in Denmark, Finland and Sweden. After three years the cumulative pregnancy rate was 1.9 for Nova-T and 5.0 for Copper-T. This difference in efficacy was statistically significant (p less than 0.001). Copper-T had a lower expulsion rate (p less than 0.05) in the total series but not in postmenstrual insertions. Differences between the two devices in other termination rates were not statistically significant. Analysis according to age and parity demonstrated that the pregnancy rate of Nova-T was lower than that of Copper-T in every age and parity group. The pregnancy rate of Nova-T was not effected by age or parity whereas the pregnancy rate and the expulsion rate of Copper-T decreased with increasing age and parity. The removal rate because of infection decreased markedly afte...