Statistical analysis
The statistical analysis was done using SPSS (version 26). Continuous
and categorical variables are presented as the median (IQR) and n (%),
respectively. The Mann-Whitney U test, χ² test, or independent sample t
test were used to compare differences between critical and non-critical
patients where appropriate. We use univariable and multivariable
logistic regression analysis to explore risk factors associated with
adverse outcome. Considering the total number of patients with adverse
outcome (n=28) in our study and to ensure stability of the multivariable
logistic regression model, four variables were included in the analysis.
Our model included age, comorbidity of cardiac disease, hs-cTnI
elevation and echocardiographic signs of pulmonary hypertension based on
previous studies and results of baseline characteristics comparison. For
all analysis, statistical significance was considered p< 0.05.