Statistics
Categorical variables are expressed as counts (percentages) and compared with the chi-squared test or Fisher’s exact test. Continuous variables are expressed as mean (standard deviation) or median [interquartile range] and compared using Student’s t-test and Mann–Whitney U test, respectively. Event-free survival rates were estimated by the Kaplan–Meier method. Univariate and multivariate logistic regression analyses were used to determine clinical factors associated with AF recurrence after the final procedure and extent of LVAs, wherein variables with a P value < 0.05 in the univariate models were included in the multivariate analysis. All analyses were performed using SPSS 26.0 (IBM Corporation, Armonk, NY). P values of less than 0.05 were considered statistically significant.