LONGITUDINAL STUDY OF NORPLANT CHOICE AND USE DYNAMICS

北方工厂选择和使用动态的纵向研究

基本信息

批准号：
3331134
负责人：
HELEN P. KOO
金额：
$ 28.23万
依托单位：
RESEARCH TRIANGLE INSTITUTE
依托单位国家：
美国
项目类别：
财政年份：
1992
资助国家：
美国
起止时间：
1992-08-01 至 1997-07-31
项目状态：
已结题

项目摘要

This application proposes a study of the process of adoption of Norplant and its patterns of use in two sites in the U.S. The research is important because Norplant could potentially have a great impact on the health and well-being of American women. This is because Norplant, being highly effective and requiring no action from women after its insertion, is likely to become widely used and thus it has the potential for significantly decreasing the incidence of unintended pregnancies among some groups. We propose a longitudinal study of a cohort of women beginning a new segment of contraceptive use or nonuse, enrolled over one year at sites in Atlanta GA and Charlotte NC. We will investigate factors affecting women's decision to choose Norplant or other methods or nonuse at that time. We will then study the patterns of choices they subsequently make about Norplant versus other methods as they progress in their contraceptive careers over the course of three years, and how changes in their lives, experience with various methods, and other factors affect the probabilities and timing of contraceptive change, discontinuation and unintended pregnancies throughout this time. After an initial 6-month period to develop instruments and procedures, we will enroll 800 Norplant acceptors and 400 each of women who choose instead to use primarily the pill, condoms, and no method, and also 100 each of women choosing sterilization and remaining methods, using a stratified random sample design. We will conduct a personal 45-minute interview with these women at the time of enrollment, to determine reasons for choosing their method and other data necessary for investigating determinants of choice and of continuation and use-effectiveness. To determine women's changes to subsequent methods and associated continuation and use-failure rates, as well as the factors accounting for these, we will longitudinally follow the baseline users of Norplant, pill, condom and nonuse. Users of other methods will not be followed because of budget constraints. We will conduct 15-minute reinterviews with the follow-up sample at 12-month intervals after enrollment over three years. We will perform final analysis and paper writing during the final fifth year. Methods of analysis to be used include: well-established descriptive and multivariate techniques such as multiple regression, multinomial logistic regression, and hazards models; and newly developed techniques required to analyze choice of sequential multiple methods and discontinuation and use-effectiveness with these methods (mixed point processes models with random and fixed covariate effects and semi-Markov models with covariates).

该申请提出了对采用诺植物的过程的研究它在美国的两个站点中的使用方式重要，因为Norplant可能会对美国妇女的健康和福祉。这是因为Norplant，高效，插入妇女后不需要采取任何行动可能会被广泛使用，因此具有显着降低了意外怀孕的发生率一些小组。我们提出了一项纵向研究，对一群女性开始了新的避孕药使用或不使用的细分市场，在网站上招募了一年在亚特兰大GA和夏洛特北卡罗来纳州。我们将调查影响的因素妇女决定选择Norplant或其他方法或不使用的决定时间。然后，我们将研究他们随后做出的选择模式关于诺植物与其他方法的发展避孕职业在三年的时间内，以及如何变化他们的生活，各种方法的经验以及其他因素影响避孕变化，中断和这段时间内意外怀孕。经过最初的6个月来开发工具和程序，我们将注册800名Norplant受体和400名选择的女性而是主要使用药丸，避孕套和无方法，也是100 每个女性选择灭菌和剩余方法，使用分层随机样品设计。我们将进行45分钟的个人在入学时对这些妇女的访谈，以确定选择其方法和其他数据的原因调查选择的决定因素，延续和使用效果。确定妇女对随后方法的变化以及相关的延续和使用率以及因素考虑到这些，我们将纵向关注 Norplant，药丸，避孕套和不使用。其他方法的用户将不是由于预算限制而遵循。我们将进行15分钟以12个月的间隔重新浏览随访样本入学三年。我们将执行最终分析和纸张在最后五年写作。要使用的分析方法包括：完善的描述性和多变量技术，例如多元回归，多项式逻辑逻辑回归和危害模型；以及新开发的技术需要分析顺序多种方法和中断的选择以及这些方法的使用效应（混合点过程模型与随机和固定的协变量效应以及半马多夫模型协变量）。