Statistical analysis
Descriptive statistics are presented as N (%) for categorical variables and median (Min, Max) for continuous variables. The Exact Wilcoxon rank-sum test was used to compare distributions of laboratory values by ICU survival and CKRT liberation. The exact chi-square test was used to compare categorical variables by ICU survival. P-values <0.05 are considered to be statistically significant. Median (Min, Max) are reported for all statistical tests. All analyses were conducted in SAS 9.4 (Carry, NC).