论文部分内容阅读
本研究用实验流行病学方法,随机对比了单环、TCu 220 C、MLCu 375和宫形器在广东省育龄妇女中的避孕效果。从1988年3月至1989年5月,每种节育器各置384例共1536例。本文报道研究的初步结果:MLCu 375,TCu 220 C和宫形器的一年粗累积继续存放率明显高于单环;粗累积脱落率明显低于单环。MLCu 375和TCu 220 C的粗累积妊娠率明显低于单环和宫形器,皆有极显著统计学意义。本文还对可能影响节育器避孕效果的一些因素进行了单因素和Cox模型多因素生存分析。
In this study, experimental epidemiological methods were used to compare the contraceptive effectiveness of single-loop, TCu 220 C, MLCu 375 and womb-shaped devices in women of childbearing age in Guangdong Province. From March 1988 to May 1989, a total of 3836 cases of each IUD were placed in 1536 cases. This paper reports the preliminary results of the study: The one-year cumulative survival rate of MLCu 375, TCu 220 C and the uterus was significantly higher than that of the monocycle; the cumulative rate of exfoliation was significantly lower than that of the monocycle. The gross cumulative pregnancy rates for MLCu 375 and TCu 220 C were significantly lower than those for monocyclic and uterine devices, both of which were of significant statistical significance. This article also conducted a one-factor and Cox model multivariate survival analysis of some factors that may affect the contraceptive effectiveness of IUD.