Statistical analysis
The data were analyzed using IBM SPSS Statistics for Windows version
20.0 (IBM Corp., Armonk, NY). Pearson’s chi-square test and
Mann–Whitney U test were used for intergroup comparisons of parametric
data and nonnormally distributed numerical data, respectively.
Independent-samples t test was used to compare demographic data and
laboratory parameters between the groups. Wilcoxon analysis was used for
intragroup comparisons of laboratory values during follow-up. Pearson
correlation analysis was used to evaluate relationships between KIM-1
and suPAR levels and CRP, ferritin, D-dimer, lymphocyte,
neutrophil/lymphocyte ratio, troponin-I, and
PaO2/FiO2. A p-value less than 0.05 was
considered statistically significant.