Table 2

Univariate Cox regression analysis of AF recurrence

HR95% CIp Value
Clinical characteristics
 Age (per year)1.0050.977 to 1.0330.74
 Male gender (yes/no)0.8730.503 to 1.5140.87
 AF duration (per month)1.0080.959 to 1.0590.76
 Number of failed antiarrhythmic drugs (per drug)1.0580.886 to 1.2620.54
 Persistent AF (yes/no)3.2642.015 to 5.285<0.001
 Hypertension (yes/no)1.0630.658 to 1.7170.80
 Hypercholesterolaemia (yes/no)1.4060.856 to 2.3080.18
 Coronary artery disease (yes/no)0.2170.030 to 1.5640.13
Echocardiographic characteristics
 Calibrated IBS LA (per 5 dB)2.6702.119 to 3.363<0.001
 LA volume index (per ml/m2)1.0231.006 to 1.0390.007
 LV ejection fraction (per %)0.9710.920 to 1.0240.28
  • AF, atrial fibrillation; IBS, integrated backscatter; LA, left atrium; LV, left ventricular.