Causas asociadas con hemorragia primaria posparto en mujeres andinas de Perú

OBJECTIVE: To determine the sociodemographic and obstetric factors associated with primary postpartum hemorrhage. MATERIALS AND METHODS: Retrospective case-control study conducted from January to December 2021 in postpartum patients at the Chilca Health Center, Huancayo Province, Junín Department, Peru. Cases: patients with primary postpartum hemorrhage. Controls: patients without hemorrhage, randomly selected in a 1:3 ratio. Logistic regression analysis was performed with a confidence level of 95%. RESULTS: We pooled 56 cases and 168 controls selected from a universe of 764 patients. The prevalence of primary postpartum hemorrhage in the Chilca Health Center was 33.3%. The characteristics of the group of cases and controls were different; for example, among the sociodemographic factors, women ≥ 35 years of age were almost twice as common in the group of women with primary postpartum hemorrhage as in the group without hemorrhage. Obstetric factors included antepartum fetal macrosomia (MR = 4.86; 95%CI: 1.24-19.03), intrapartum grade III-IV rupture (MR = 24.94; 95%CI: 9.19-67.67), and postpartum retained placental abruption (MR = 18.36; 95%CI: 4.98-67.59). CONCLUSIONS: Sociodemographic factors showed that women aged ≥ 35 years were almost twice as likely to have postpartum primary hemorrhage compared to the group without hemorrhage. Regarding obstetric factors, about 30% of women with more than four antenatal visits had postpartum primary hemorrhage.