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Receiver operating characteristic analysis for prediction of Control vs CKD1–4 (A), Control vs CKD1 (B), CKD2 vs CKD3 (C) CKD3 vs CKD4 (D) based on the prediction model.
Note: Prediction model: CKD = −4.847+ (1.234 × NPS) + (6.160 × plasma IDO activity).
Abbreviation: CKD, chronic kidney disease.
