The determinants of IUD discontinuation in China: a discrete-time competing risk model analysis.

This research examines the social, demographic, and family-planning-program factors that influence the occurrence of IUD discontinuation among Chinese women, using a sample of 14,639 IUD use segments from the 1988 Chinese National Survey of Fertility and Contraceptive Prevalence. A discrete-time competing-risk event history method is employed to identify the determinants of IUD discontinuation by five kinds of reasons: contraceptive failure, expulsion, switching method, side-effects and other nonmethod-related reasons. The predictors of IUD discontinuation suggest that a number of mechanisms are in operation. Some of the determinants may reflect the effects of the family planning program; some may illustrate women's physiological and biological reactions to IUD's; some may be related to women's previous history of contraceptive use; and still others may indicate social characteristics of women that lead them to have their IUD's removed.