Statistical analysis
Categorical variables are expressed as numbers and proportions and were
compared using Fisher’s exact test. Continuous variables are shown as
mean and standard deviation or median with interquartile range and were
compared using a Student t-test or a Mann-Whitney U test. Lead
parameters before and after AF ablation were compared using a paired
t-test or a Wilcoxon signed-rank test, as appropriate. We performed 1:1
propensity score-matching analysis based on age, sex, and AF type to
compare the results of SVCI and procedural characteristics in the CIED
group with those in the non-CIED group. Two-sided P < 0.05 was
considered statistically significant, and JMP pro13® software (SAS
Institute Inc., Cary, NC, USA) was used.
Results