Fig. 3
Product-limit estimates for the probability of late recurrent atrial fibrillation (AF) stratified by the number of risk factors present. Risk factors for late recurrent AF were non-paroxysmal AF, left atrial dimension ≥ 5.5 cm, and the presence of one or more PV with a cross-sectional area (CSA) ≥3.7 cm2. The presence of more risk factors was associated with more late recurrent AF (p = 0.001)