2.4 Statistical Methods
The SPSS 22.0 statistical package (IBM, Armonk, NY, USA) was performed for data analyses. Continuous variables were expressed in our study as mean ± standard deviation or median (interquartile range) values. Normal distribution of the groups was tested using the Kolmogorov–Smirnov test. Continuous variables were compared using an independent-samples t-test between the 2 groups or adjusted t-test. The Pearson correlation coefficient was used to identify the correlation between the groups. Multiple linear regression analyses were performed to examine the independent correlates between 3D left atrial function and 2D conventional echocardiographic parameters in ESRD. Two-tailed P-values <.05 were considered statistically significant.