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.