Statistical analysis
Median values with range were calculated for each patient variable with
numerical data. Percentage of total patients was calculated for
categorical characteristics. Welch’s t-test, unpaired t-test and
chi-square was used for comparison of ASD and pulmonary hypertension
hemodynamic measurements on echocardiogram and catheterization.
Inter-observer variability and concordance of the EDSPA measurements
were calculated using the sign of Pearson’s r and the Lin’s concordance.
Receiver operating characteristic curves were utilized to display the
predictive ability of EDSPA to discriminate select groups.