Figure 4. Cumulative Incidence of Severe Stroke Stratified by Stroke History.
The cumulative incidence curves for disabling or lethal stroke (modified Rankin Scale [mRS] score ≥3) comparing the control and implantable loop recorder (ILR) groups are stratified by prior stroke (A), no prior stroke (B), prior stroke, transient ischemic attack (TIA), or systemic arterial embolism (SAE) (C), and no prior stroke, TIA, or SAE (D). HR indicates hazard ratio.