本文报道上海郊区农村妇女使用不锈钢宫内节育器448例的随访结果。采用寿命表法计算不同随访时间的宫内节育器继续存放率及各种停用率;用时间等级检验法(或称寿命表差别X~2检验法)对一般认为可能引起脱落的因素如置环后月经量、劳动强度、放置时产次以及放置时间等逐个进行分析。结果,继续存放率随放置年数增加而逐年下降,尤以放置后一年内更为显著,直至五年后基本稳定,七年累计继续存放率为30.25%。累计停用率较高的主要原因为脱落和非因症取出,一年累计脱落率为23.5%,二年达31.94%,以后基本稳定。而放置后二年的非因症取出率迅速上升,六年达88.17%,主要原因为一产妇生育间隔期满而要求再生育。放置后月经量增多和放置时为一产妇女的累计脱落率较高,劳动强度和放置时间与脱落率关系不大。本组资料累计因症取出率较低而带器妊娠率较高,是否与宫内节育器的种类、大小有关,有待进一步探讨。 This article reports the follow-up results of 448 rural women using stainless steel IUD in Shanghai suburbs. The life table method was used to calculate the continuous storage rate and various discontinuation rates of IUDs at different follow-up times. Factors such as the time grade test (or the difference in life table method X ~ 2 test) Ring after menstrual flow, labor intensity, placement time and placing time, etc. one by one for analysis. As a result, the continuous deposit rate decreased year by year with the increase in the number of years of placement. In particular, it became even more pronounced in the first year after placement and basically stabilized after five years. The cumulative deposit rate for the seven-year period was 30.25%. Cumulative discontinuation rate is higher than the main reason for the loss and non-excretion, the cumulative shedding rate was 23.5% in one year, up to 31.94% in two years, after the basic stability. However, the rate of non-morbidity withdrawal after two years of placement rose rapidly, reaching 88.17% in six years, mainly due to the requirement of one-child fertility after expiration of one maternity period. After placement, the increase of menstrual flow and placement of a woman with a higher cumulative rate of shedding, labor intensity and placement time and shedding rate has little to do. This group of information accumulated due to the lower rate of removal of the fetus with a higher pregnancy rate, whether the type and size of intrauterine device, to be further explored.