OBJECTIVES: to identify preterm delivery prevalence in pregnant women submitted to preterm delivery inhibition treatment and to analyze associated factors. METHODS: cross sectional study with data collected from 163 pregnant women medical files seen from 1995-2000 at the University Hospital of the University of São Paulo, Brazil. The dependent variable was preterm delivery and the independent ones were: age, education, job, parity, companion, smoking, prior urinary infection, number of prenatal medical visits and birth interval. Analysis was performed through association by the Chi-square test and univariate and multiple logistic regression models. RESULTS: 66.3% of the women had preterm deliveries and in 22.7% of the cases, delivery occurred before 34 weeks. There was a statistically significant association between preterm birth and no partner, nulliparity and a low number of prenatal visits. CONCLUSIONS: special attention should be given to nulliparous pregnant women with reduced numbers of prenatal medical visits submitted to preterm delivery inhibition treatment with the objective of preventing premature births.
Infant; premature; Labor obstetric; Multivariate analysis
