Screening de primer trimestre de preeclampsia tardía en gestantes de bajo riesgo en un centro de bajo volumen obstétricovalidación externa de un modelo predictivo

Abstract

            Background. The external validation of predictive model of late preeclampsia in a low volume and low risk obstetrical setting.            Methods.  A cohort was created of 174 singleton pregnancies of 11+0-13+6 gestational weeks at Clinica Universidad Navarra from September 2011 to March 2013, which was considered as a validation cohort of a previously described model for late PE (Hospital Clinic, Barcelona).              Results.  A total of 7 (4%) women developed late PE.  In the validation cohort the area under the curve of the model was 0.69 (95% CI 0.45-0.93). Detection rates for a 5, 10 and 15% of false positive rates were 21.9, 31.4% and 38.6% respectively. When comparing the areas under the curve of the validation cohort with the construction cohort, no statistical differences were found (p=0.68).                  Conclusion. The combination of maternal history, pregnancy associated plasma protein-A and mean arterial pressure is moderately useful to predict preeclampsia in a low risk and low volume obstetrical setting. The predictive model of the Clinic Hospital of Barcelona is a valid tool in predicting late preeclampsia in this setting.