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

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.