Continuous data are summarized by median values and interquartile range, dichotomous by numbers and proportions. P-values are determined using the Wilcoxon's tests for continuous variables and Chi-square test for dichotomous variables. Covariates with statistically significant differences (p-value<0.05) in median or proportions are highlighted in bold font. Note: the univariate tests are only descriptive and should not be used for the triaging of patients.