[First trimester screening of late-onset preeclampsia in a low risk and low volume obstetrical setting: external...

The external validation of predictive model of late preeclampsia in a low volume and low risk obstetrical setting.

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).

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% respec-tively. When comparing the areas under the curve of the validation cohort with the construction cohort, no statistical differences were found (p=0.68).

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.