Figure 1 Receiver operating characteristic curves for nutritional and inflammatory indices in distinguishing chemotherapy regimens.Receiver operating characteristic (ROC) curves illustrating the discriminative performance of pretreatment nutritional and inflammatory indices in distinguishing patients who received ddAC-THP versus TCHP neoadjuvant chemotherapy. Indices include the Naples Prognostic Score (NPS), C-reactive Protein-to-Albumin Ratio (CAR), Modified Glasgow Prognostic Score (mGPS), Controlling Nutritional Status (CONUT), Neutrophil-to-Lymphocyte Ratio (NLR), Lymphocyte-to-Monocyte Ratio (LMR), and Prognostic Nutritional Index (PNI). The diagonal dotted line represents the reference line (AUC=0.50). Among all indices, CAR demonstrated the highest discriminative ability, whereas other markers showed limited utility.