Figure 4. Time to recurrence of AF for the central sleep apnea group, in those adherent and nonadherent to treatment.

Survival probability (depicted on the y axis) is the probability of survival free of AF. Time to event (depicted on the x axis) is the time to first documented ECG recurrence of AF. Compliance refers to adherence to positive airway pressure treatment with 0 representing nonadherent to treatment group and 1 representing adherent to treatment group. AF = atrial fibrillation and/or atrial flutter, ECG = electrocardiography.