SPTB and preterm premature rupture of the membranes: Indeed, the area under the curve (AUC) of the model for sPTB-IM was 0.69, with a 0.39 sensitivity based on 90% specificity; the model for sPTB-PPROM showed an AUC of 0.79, with 0.49 sensitivity based on 90% specificity.