In univariate Cox analysis , the two ablation groups were associated with less AF ( BA group vs control group : P < 0.001 ; LA group vs control group : P < 0.001 ) as well as atrial tachycardia arrhythmia ( AF/AT/AFL ) recurrent ( BA group vs control group : P < 0.001 ; LA group vs control group : P = 0.02 ) .