Predictive Accuracy of the Nomogram
The C-index of the nomogram predicted by the risk of fetal distress was 0.733(95%CI:0.690- 0.776)for total cases,and was acknowledged to be 0.718 through bootstrapping validation. Simultaneously, The C-index of the prediction nomogram of admission to NICU risk was 0.794 (95%CI:0.766- 0.822) for total cases, and was confirmed to be 0.792 through bootstrapping validation.
Furthermore, our models demonstrated good discriminative ability in both the total (AUC of prediction model one: 0.733, Figure3A. AUC of prediction model two: 0.794, Figure 3B) and internal Validation (AUC of prediction model one: 0.727, Figure3C. AUC of prediction model two: 0.801, Figure 3D ) cases, which performed a good prediction capability in the risk of fetal distress and risk of admission to NICU nomogram.