A novel nomogram for the differential diagnosis between advanced and early appendicitis in pediatric patients

Aim: To develop a nomogram for differential diagnosis between advanced and early pediatric appendicitis (PA). Patients & methods: We retrospectively studied 669 PA patients. Patient characteristics and 24 serum markers were subjected to univariate and multivariate analysis, based on which the nomogram was constructed. Results: Fibrin degradation product, CRP and Na⁺ differed significantly between the advanced and early PA. The value of area under the receiver operating characteristic curve (AUC) was 0.8602, which was greater than that of a single serum marker. Furthermore, the nomogram showed better discriminative ability than the biomarker alone. Notably, validation indicated high stability and reproducibility. Conclusion: The nomogram is superior to the serum marker alone, and may hold promise in clinical application.