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Integration of IPSOV and clinical characteristics. (a) Training set. (b) Validation set 1. (c) Validation set 2. (d) Validation set 3. Restricted mean survival (RMS) curve for IPSOV and integrated model. In addition, we provided the C-index comparison of the model with clinical characteristics only and the integrated model. P-value represents the difference between the two models in term of C-index.
