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Receiver operating characteristic (ROC) curves and area under the curve (AUC) for NomogramI in pulmonary hypertension (PH) ≥ I and NomogramII in PH ≥ II grade groups.
In the PH ≥ I grade group, the ROC and corresponding AUC of NomogramI and independent factors in the derivation set (A–C) and validation set (D–F). In the PH ≥ II grade group, the ROC and corresponding AUC of NomogramII and independent factors in the derivation set (G–I) and validation set (J–L).