Statistical Analysis
Continuous variables are summarized as mean ± standard deviation and dichotomous variables are presented as the number and percent of subjects. Baseline and procedural characteristics are summarized as means. Kaplan-Meier methods were used to estimate the 36-month freedom from atrial arrhythmia. Standard error was calculated with Greenwood’s formula. Values of p <0.05 were considered statistically significant. Statistical analyses were performed with Statistics Kingdom.