Statistical analysis
Continuous data are expressed as the mean ± standard deviation or median (interquartile range). Categorical data are presented as absolute values and percentages. Tests for significance were conducted using the unpaired t -test, repeated measures analysis of variance, or a nonparametric test (Mann-Whiney U -test) for continuous variables and the chi-squared test or Fisher’s exact test for categorical variables. AF/AT recurrence rates were calculated using the Kaplan-Meier method. Survival curves between the groups were compared using the 2-sided Mantel-Haenszel (log-rank) test. A p-value < 0.05 was considered statistically significant. Clinical factors associated with AF recurrence were determined by univariate and multivariate Cox proportional hazards models. Variables with a p-value ≤ 0.05 in the univariate models were included in the multivariate analysis. The analyses were exploratory and no adjustments were made. All analyses were performed using commercial software (SPSS version 25.0®, SPSS, Inc., Chicago IL, USA).