Grady W R, Hirsch M B, Keen N, Vaughan B
Stud Fam Plann. 1983 Jan;14(1):9-19.
Using data from the National Survey of Family Growth (NSFG), this study reports differentials in contraceptive use-failure and continuation among married women aged 15-44 years in the United States. Failure rates differed by contraceptive intention. Within categories of intention, these rates differed by method, age, race, and parity. Users of modern methods had higher continuation rates than users of traditional methods. These results indicate that a woman's motivation is an important factor in long-term successful use of available contraceptive methods and that more effective and easier to use methods need to be developed.
本研究利用全国家庭成长调查（NSFG）的数据，报告了美国15 - 44岁已婚女性在避孕使用、失败率和持续使用方面的差异。失败率因避孕意图而异。在意图类别中，这些比率因方法、年龄、种族和生育次数而有所不同。现代方法的使用者比传统方法的使用者有更高的持续使用率。这些结果表明，女性的动机是长期成功使用现有避孕方法的一个重要因素，并且需要开发更有效且更易于使用的方法。
