Table 1

Baseline Characteristics of the Patients With and Without Adverse Events

VariableWith Events (n = 27)Without Events (n = 538)p Value
Age, yrs67.8 ± 12.753.5 ± 12.0<0.001
Age ≥65 yrs59.3%17.8%<0.001
Age ≥75 yrs40.7%3.0%<0.001
Male77.8%72.3%0.534
Medical history
 Hypertension74.1%45.0%0.003
 Diabetes mellitus25.9%11.9%0.065
 Congestive heart failure33.3%6.5%<0.001
 Coronary artery disease66.7%27.1%<0.001
 Previous stroke/TIA25.9%4.1%<0.001
 Previous vascular disease7.4%1.1%0.052
Long-term use of warfarin7.4%3.2%0.216
Left atrial diameter, mm45.5 ± 11.839.1 ± 6.7<0.001
LVEF, %52.7 ± 11.058.9 ± 7.70.008
AF type (paroxysmal AF)48.1%79.4%<0.001
Recurrence rate after ablations59.3%28.1%<0.001
CHADS2 score2 (1–3)1 (0–1)<0.001
CHA2DS2-VASc score3 (2–4)1 (0–2)<0.001

Values are mean ± SD, %, or median (interquartile range).

AF = atrial fibrillation; LVEF = left ventricular ejection fraction; TIA = transient ischemic attack.