Risk factors for myocardial dysfunction
To identify independent factors associated with left ventricular and atrial dysfunction, we performed logistic regression models using stepwise analysis. The closeness of fit of the logistic regression model was assessed using the Hosmer & Lemeshow test. In addition, we evaluated the performance of the model using the area under the receiver operator curve (AUC) with its respective 95% confidence interval. All statistical analyses were performed using the Statistical Package for Social Sciences software (SPSS, version 21.0), R software (version 3.5.1) and GraphPad Prism (Version 6.0). A p value <0.05 was considered statistically significant.