Department of International Health, Johns Hopkins School of Hygiene and Public Health, 615 North Wolfe Street, 21205, Baltimore, Maryland.
Demography. 1969 Aug;6(3):335-46. doi: 10.2307/2060401.
The technique of multi-sort analysis was used to compare the relative duration of use of oral and intrauterine contraception among low socio-economic groups in Baltimore City. The clinical records of over 12,000 women who had received contraception through the Baltimore public services were analyzed. The type of method a woman used was found to be the most important factor affecting her probability of continuing contraception. Her age, race, and how long she had been using the method also influenced this probability. The strictness of the criteria used for the definition of continuation rates and the fact that experience was incomplete for many intrauterine contraceptors probably in part explain the somewhat low continuation rates obtained for both methods. It is suggested that the intrinsic characteristics of each method may lead to a clinical impression favoring the oral even when statistical evidence, as presented here, favors the intrauterine method.
多因素分析技术被用于比较巴尔的摩市社会经济地位较低的人群中口服和宫内节育器的相对使用时间。分析了超过 12000 名通过巴尔的摩公共服务接受避孕的妇女的临床记录。发现妇女使用的方法类型是影响其继续避孕概率的最重要因素。她的年龄、种族以及使用方法的时间长短也影响这种可能性。继续率的定义标准的严格程度以及宫内节育器的许多经验不完全的事实，可能在一定程度上解释了这两种方法获得的续用率都较低的情况。有人建议，每种方法的固有特征可能导致临床印象偏向于口服方法，即使这里提出的统计证据偏向于宫内节育器方法。
