Statistical Methods
Statistical analyses of data were performed using MS Excel (Microsoft,
Redmond, Washington), XLSTAT (Addinsoft, New York, New York) and the
statistical software package R. Data was checked for normal distribution
by visual assessment of histograms, Q-Q plots and additionally
Shapiro-Wilk-test. Normally distributed data is presented as mean ±
standard deviation, not normally distributed data as median with
interquartile range (IQR). Percentiles were estimated using the functionquantile of the statistical software package R with standard
settings. Associations between 3D-RV FWS and patient outcomes was
evaluated by linear (for continuous outcomes) or logistic (for binary
outcomes) regression analysis. We adjusted for age and sex.