Nomogram-based prediction of post-splenectomy thrombocytosis in children with hereditary spherocytosis

Figure 2 Nomogram for predicting postoperative thrombocytosis after splenectomy. Nomogram developed from multivariate logistic regression integrating reticulocyte percentage, preoperative platelet count, transfusion volume, and mean platelet volume to estimate the individual risk of postoperative thrombocytosis in children with hereditary spherocytosis after splenectomy. Each predictor corresponds to a point value on the top axis. The total score, obtained by summing all variable points, projects onto the bottom scale to determine the predicted probability. The model demonstrated excellent discrimination (C-index = 0.85, 95% confidence interval: 0.81-0.89) and robust internal calibration. PLT: Platelet; PST: Postoperative thrombocytosis.