Statistical analysis
The prevalence of PHT was calculated using the SPSS software.Clinical, hemodynamic, and metabolic variables were
compared between patients with and without PHT with ‘‘t’’
test. Values were expressed as mean ± Standard deviation
(SD) and as percentage for categorial parameters. Differences
between groups were compared with Student’st-test for parametric continuous variables. Chi-square test was applied for
estimating the occurrence of categorical variables. Pearson’s
correlation coefficient was used to test the relationship between
PAP and other parameters. APvalue