Data
Patients’ age, gender, COVID-19 PCR test result, comorbid diseases, intubation status, the day of the intensive care hospitalization, laboratory values during hospitalization in the intensive care unit, white blood cell (WBC), hematocrit (Hct), thrombocyte (Plt), neutrophil, lymphocyte, monocytes, red cell distribution of width (RDW), Mean platelet volume (MPV), c-reactive protein (CRP), total bilirubin, albumin, aspartate aminotransferase (AST), alanine aminotransferase (ALT) values, lactate dehydrogenase (LDH), blood groups, procalcitonin, ferritin, fibrinogen, calcium (Ca), albumin, INR, blood gas parameters (Ph, PO2, PCO2, lactate) duration of stay in the intensive care unit were recorded. In addition, neutrophil-lymphocyte ratio (NLR) and platelet-lymphocyte ratio (PLR) values were calculated according to laboratory values.
Statistical analysis: Statistical Package for the Social Sciences (SPSS 25 Inc., Chicago, IL, USA) computer software was used for the biostatistical analyses. The data obtained from the participating patients were expressed as mean, standard deviation values, and as a percentage where necessary. The Kolmogorov Smirnov test was used to examine the normal distribution of the data. Data with normal distribution were analyzed by student t-test. Group analysis of non-parametric data was performed with the Mann-Whitney U test. Logistic regression test was used for univariate analysis and to calculate odds ratios (OR) with 95% confidence interval (CI). Categorical groups were compared with the chi-square test. Cut-off values were obtained by receiver operating curve (ROC) analysis.