Clinical characteristics of the study subjects stratified by time-averaged serum sodium level.

Values for categorical variables are given as number (percentage); values for continuous variables are given as mean ± standard deviation or median [interquartile range].*Laboratory and dialysis-specific parameters are given as time-averaged values. GFR, glomerular filtration rate; nPCR, normalized protein catabolic rate; ACE, angiotensin converting enzyme; ARB, angiotensin receptor blocker.Clinical characteristics of the study subjects stratified by time-averaged serum sodium level.