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).