RT Journal Article T1 Advanced Maternal Age as an Obstetric Risk Factor: Current Experience in a Hospital from Northwestern Spain. A1 Peteiro-Mahia, Laura A1 Blanco-López, Susana A1 López-Castiñeira, Noelia A1 Navas-Arrebola, Rocío A1 Seoane-Pillado, Teresa A1 Pertega-Díaz, Sonia K1 Cesarean Section K1 Delivery, Obstetric K1 Labor, Obstetric/complications K1 Maternal Age K1 Pregnancy AB Studies updating the evidence in advanced maternal age as an independent factor of obstetric risk are needed. The aim of this study was to determine the prevalence of ≥ 35-years-old pregnant women who give birth in a Spanish hospital in Northwestern Spain, and to describe the incidence of maternal and perinatal morbidity and mortality. Retrospective follow-up observational study including women ≥ 20 years-old who gave birth over one year (n = 1378). Data were collected from medical records, including socio-demographic characteristics, comorbidities, gestational conditions, variables related with the delivery and perinatal outcomes. Multivariable logistic regression analysis was performed to determine the association of advanced maternal age with obstetric and perinatal outcomes. Forty-two percent of pregnant women were ≥ 35 years old. In the multivariable analysis, advanced maternal age was associated with the likelihood of gestational diabetes (OR = 1.84; 95% CI = 1.10 - 3.07), hypothyroidism (OR = 2.11; 95% CI = 1.17 - 3.80), lower probability of an eutocic delivery (OR = 0.74; 95% CI = 0.56 - 0.98), and a hospital admission > four days (OR = 2.91; 95% CI = 1.95 - 4.35). An association with the rate of C-sections was not found (OR = 1.24; 95% CI = 0.89 - 1.72). A high prevalence of pregnant women of advanced maternal age was confirmed. There was a higher rate of comorbidities and longer hospital admissions in older women but not a higher rate of higher C-sections and other complications. YR 2022 FD 2022-03-14 LK http://hdl.handle.net/10668/21746 UL http://hdl.handle.net/10668/21746 LA en DS RISalud RD Apr 9, 2025