Retained predictors in each of 5 imputed dataset and choice of the predictors.

Predictors listed in this table were entered to logistic regression model with backward elimination procedure. X indicates predictors retained after backward elimination procedure in each of the five imputed dataset. Predictors which retained all of the five imputed dataset were considered as candidate predictors of final prediction model. After further discussion based on clinical relevance, six predictors were chosen as the final prediction model.eGFR, estimated glomerular filtration rate; CNS, central nervous system; ESA, erythropoiesis-stimulating agentaItems related to diabetes and renal disease were excluded from the original Charlson Comorbidity Index in the present study.Retained predictors in each of 5 imputed dataset and choice of the predictors.