2.6 Logistic regression analysis
Binary logistic regression was used to estimate odds ratios (ORs) for
death from any cause in the PAH patients treated with each pulmonary
vasodilator or supportive therapy. Based on the results of ORs, the
variables that may be associated with death from any cause in the PAH
patients were confirmed by adjusted ORs calculated from multivariate
analysis. The final multivariate model selection was based on the Akaike
information criterion (AIC) and receiver operating characteristic (ROC)
analysis.