Figure 2. Time to First Event Curves for the Primary End Point.

Kaplan-Meier estimates of detection of cumulative atrial fibrillation (AF) or atrial flutter (AFL) lasting 6 minutes or longer or documentation of AF or AFL by a single 12-lead electrocardiogram within 30 days after randomization. The primary end point occurred in 32 patients (19.6%) in the monitoring group and in 3 patients (1.7%) in the usual care group for an absolute difference of 17.9% (95% CI, 11.5%-24.3%; P < .001).