Decision Curve Analysis of the Nomogram
The decision curve analysis (DCA) was used to perform the clinical usability and benefits of the nomogram. As shown in Figure 5A, the DCA showed that if the threshold probability of fetal distress in a patient was the range of 3%-75%, separately, using this fetal distress risk nomogram to predict the risk of fetal distress adds more benefit than the scheme. The DCA presented that if the threshold probability of admission to NICU was the range of 19%-97% in Figure 5B,respectively, using this the admission to NICU risk nomogram could predict the risk of admission to NICU adds more benefit than the scheme. Net benefit in this range was compared to several overlaps on basis of the fetal distress risk nomogram and admission to NICU risk nomogram.