[Sociodemographic and clinical data predicting unplanned pregnancy in young 13 to 24 years, Spain]

Unplanned pregnancy (UP) is still a public health problem. This study aims at finding out the sexual behaviours and contraceptive practices related to UP in young women.

583 women between the ages of 13 and 24 years old were assisted in the contraception office in 2012. Dependent variable: UP. Independent variables: sociodemographic, sexual behaviours and contraceptive practices. Bivariate analysis, chi-squared and Student's t tests. Multivariate analysis, binary logistic regression.

174 (29.8%) young girls had had a UP. The risk of UP increased in immigrant women (OR 2.858 [CI 95% 1.808-4.519]), in less educated young women (OR 2.343 [CI 95% 1.361-4.035]), in those who did not use a safe contraceptive method in their first coitus (OR 3.043 [CI 95% 1.900-4.875]), in those who stated problems with the use of methods (OR 2.092 [CI 95% 1.267-3.454]) and in those who attend irregularly the consultation (OR 2.063 [CI 95% 1.275-3.339]). There is no relationship with age (teenagers/young). The model is considered acceptable: Hosmer-Lemeshow is not significant and its discrimination power is at 77%.

Predictors of unplanned pregnancy in young women are: immigrant women, less educated young women, not using use a safe contraceptive method in their first coitus, stated problems with the use of methods and attend the consultation irregularly.