Table 5. The frequency of missing data of variables included in the multivariate model.

Abbreviations: APACHE, Acute Physiological and Chronic Health Evaluation; SOFA, Sequential Organ Failure Assessment; CRRT, continuous renal replacement therapy; IMV, invasive mechanical ventilation.

Variables	Missing data
Age	0 (0%)
APACHE-IV (first day of ICU admission)	3 (2.6%)
SOFA (first day of ICU admission)	0 (0%)
Myocardial injury	0 (0%)
Previous stroke	0 (0%)
Creatinine	1 (0.9%)
Lactate	1 (0.9%)
Duration of IMV days	0 (0%)
CRRT	0 (0%)
ICU length of stay	0 (0%)