Table 3.

Overview of the influence of repeated measurements, including unclassifiable results, implanted cardiac device, and paced rhythms, on the accuracy of the single-lead electrocardiographic Apple Watch notification

	First recording (N = 129)	Second recording (N = 129)	Third recording (N = 129)	First recording incl. unclassifiable results (N = 129)	First recording excl. patients with CIED (N = 104)	First recording excl. patients with paced rhythm (N = 113)
Sensitivity, AF	93.5%	94.6%	93.0 %	66.2%	97.5%	95.5%
Specificity, SR	100%	100%	96.5 %	73.4%	100%	100%
% Inconclusive	6.2%	3.9%	3.9%	-	5.8%	5.3%
% Poor recording	18.6%	7.8%	4.7%	-	17.3%	17.7%

AF = atrial fibrillation; CIED = cardiac implantable electronic device; Excl. = excluding; HR = heart rate; Incl. = including; SR = sinus rhythm.