Jones E F, Paul L, Westoff C F
Stud Fam Plann. 1980 Feb;11(2):39-50.
The relationship between contraceptive failure and selected characteristics of users is examined using data collected in the 1970 and 1975 rounds of the National Fertility Study. Intention regarding future childbearing and choice of contraceptive method are found to be the most important considerations. Within categories of intention, choice of method appears to have an important influence on differentials by age and other characteristics. The longitudinal aspect of the study design permitted the inclusion in the analyis of certainty of intention, coital frequency, and women's perceptions of their own ability to control fertility.
利用1970年和1975年两轮全国生育力研究收集的数据，研究了避孕失败与使用者选定特征之间的关系。结果发现，对未来生育的意愿和避孕方法的选择是最重要的考虑因素。在意愿类别中，方法的选择似乎对年龄和其他特征的差异有重要影响。研究设计的纵向方面使得能够在分析中纳入意愿的确定性、性交频率以及女性对自身控制生育能力的认知。
