Statistical Analysis
All statistical tests were two-sided with p≤0.05. Descriptive statistics
such as mean (SD) for continuous variables and frequency (%) for
categorical variables were reported for the study sample. Statistical
analysis was performed using SAS version 9.4 and STATA version 14. A
Kruskal-Wallis test was used for correlating LAA ostial measurements
with other LA morphological and functional metrics. The t-test or
two-sample Wilcoxon test were used to compare LA and LAA morphological
parameters in patients with or without certain comorbidities, depending
on normality of variable. The two-sample Wilcoxon test was also used to
compare pre- and post-ablation LAA ostial parameters.