Statistical analysis
The data are expressed as the mean ± standard deviation or median (interquartile range) for continuous variables, and as absolute frequencies and percentages for categorical variables. For continuous variables, the differences between the groups were compared using a Student t test or Mann-Whitney U test, and for categorical variables, the Fisher exact test. The comparison of the eGFR between the two groups at baseline and one year was performed by a paired Student t test. A two-way repeated-measures ANOVA was used to compare the changes in the eGFR from baseline to three months and one year after between the two groups. A multivariate logistic regression analysis was performed to investigate the predictors associated with the change in the renal function. All tests were two-sided and a p value of < 0.05 was considered statistically significant. A Kaplan-Meier analysis and log-rank test were performed to analyze the probability of the freedom from arrhythmia recurrence after CA. The propensity score creation and all statistical analyses were conducted using SPSS 26.0 software (IBM Inc., Armonk, NY, USA).