Table 4.
Univariate and multivariate Cox regression analysis for recurrence of atrial fibrillation (AF)
| Univariate | P value | Multivariate | P value | |
|---|---|---|---|---|
| Hazard ratio (95% CI) | Hazard ratio (95% CI) | |||
| Age, years | 0.975 (0.922 to 1.032) | .388 | ||
| Male gender | 2.670 (0.690 to 10.335) | .155 | ||
| Body mass index, kg/m2 | 0.937 (0.758 to 1.159) | .549 | ||
| AF duration, months | 0.988 (0.952 to 1.027) | .550 | ||
| Antiarrhythmic drugs after ablation | 0.641 (0.181 to 2.272) | .491 | ||
| Left atrial volume, cm2 | 0.991 (0.973 to 1.009) | .302 | ||
| Left atrial appendage flow velocity, cm/s | 0.992 (0.959 to 1.026) | .645 | ||
| Left ventricular ejection fraction, % | 0.933 (0.860 to 1.013) | .099 | 0.932 (0.866 to 1.003) | .060 |
| Total EAT volume, cm3 | 0.993 (0.975 to 1.010) | .314 | ||
| Left atrial EAT volume, cm3 | 1.000 (0.950 to 1.052) | .990 | ||
| LAPWI area, cm2 | 0.846 (0.682 to 1.049) | .127 | ||
| Total radiofrequency application time, min | 1.036 (0.995 to 1.079) | .090 | 1.038 (0.994 to 1.084) | .093 |
| CFAE area in the posterior wall, cm2 | 0.915 (0.683 to 1.226) | .553 | ||
| Low voltage area in the posterior wall, cm2 | 0.948 (0.822 to 1.094) | .466 | ||
| EAT overlap on LAPWI lines, cm2 | 0.370 (0.151 to 0.904) | .012 | 0.399 (0.178 to 0.891) | .025 |
| EAT overlap on LAPWI area, cm2 | 0.224 (0.024 to 2.086) | .189 |
Abbreviations: CFAE, complex fractionated atrial electrogram; EAT, epicardial adipose tissue; LAPWI, left atrial posterior wall isolation.