Concordance index for different prognostic scores in patients with CMML undergoing transplantation. The comparison of current prognostic scores according to the performance evaluated by the concordance index showed that the CMML transplant score performed better, showing an original concordance index of 0.68 and a corrected concordance index of 0.67 compared with previously established systems that included mutation status (0.60 for the CPSS-mol, 0.60 for the GFM, and 0.59 for the MMM) as well as clinical variables only (0.56 for the CPSS and 0.58 for the MDAPS). A concordance index of 0.5 represents agreement by chance alone, and a concordance index of 1 represents perfect discrimination.