IL18 and chorioamnionitis: In contrast, targeted analysis of IL8, IL10, IL18, TNFα in maternal plasma of the 2 d Sterile Chorioamnionitis Group animals improved predictive value with a mean AUC of 0.73 (95% CI 0.39–1) Sensitivity 100%, Specificity 71%, PPV 0.82, NPV 1.0 (Fig. 3C, Table 4).