Table 3. Multivariate Cox regression analysis of factors associated with postoperative recurrence (enter method).

Variables	A		B		C
	HR (95% CI)	P	HR (95% CI)	P	HR (95% CI)	P
AF type	3.207 (1.700–6.047)	0.000	3.416 (1.812–6.437)	0.000	3.572 (1.905–6.696)	0.000
AF duration	1.985(1.367–2.881)	0.000	2.148 (1.497–3.081)	0.000	2.035(1.407–2.945)	0.000
LAD	4.302 (2.341–7.904)	0.000	4.619 (2.531–8.429)	0.000	4.374 (2.392–7.996)	0.000
LSPV	3.107 (1.124–8.585)	0.029
LIPV	NA	NS
RSPV	NA	NS
OLPV			2.811 (1.089–7.257)	0.033
OSPV					2.728 (1.133–6.573)	0.025

Note: Multivariate analysis was performed using the Cox multivariate proportional hazard regression model with an enter method; NA, not assessed; NS, not significant; AF, atrial fibrillation; LSPV, left superior pulmonary vein; LIPV, left inferior pulmonary vein; RSPV, right superior pulmonary vein; OLPV, overall left pulmonary vein; OSPV, overall superior pulmonary vein; LAD, left atrial diameter.