Table 2.

Diagnostic evaluation of the arrhythmia detection in parallel tests with ECG247 Smart Heart Sensor and conventional Holter technology.

Arrhythmia and ectopic beats, n = 150	Diagnostic evaluation	ECG247 algorithm, 95% CI	ECG247 algorithm and physician review, 95% CI	Holter algorithm, 95% CI	Holter algorithm and physician review, 95% CI
Atrial fibrillation	Sensitivity	8/9 = 89% (52–100)	9/9 = 100% (66–100)	7/9 = 78% (40–97)	8/9 = 89% (52–100)
	Specificity	135/141 = 96% (91–98)	141/141 = 100% (97–100)	115/141 = 82% (74–88)	141/141 = 100% (97–100)
	Positive predictive value	57% (37–75)	100%	21% (14–31)	100%
	Negative predictive value	99% (96–100)	100%	98% (94–99)	99% (96–100)
	Diagnostic accuracy	95% (91–98)	100% (98–100)	81% (74–87)	99% (96–100)
Ventricular ectopic beats	Sensitivity	114/122 = 93% (87–97)	114/122 = 93% (87–97)	114/122 = 93% (88–97)	118/122 = 97% (92–99)
	Specificity	8/28 = 29% (13–49)	28/28 = 100% (88–100)	16/28 = 57% (37–76)	28/28 = 100% (88–100)
	Positive predictive value	85% (82–88)	100%	90% (86–94)	100%
	Negative predictive value	50% (29–71)	78% (64–87)	67% (49–81)	88% (73–95)
	Diagnostic accuracy	81% (74–87)	95% (90–98)	87% (80–92)	97% (93–99)
Supraventricular ectopic beats	Sensitivity	130/135 = 96% (92–99)	130/135 = 96% (92–99)	131/135 = 97% (93–99)	131/135 = 97% (93–99)
	Specificity	7/15 = 47% (21–73)	15/15 = 100% (78–100)	9/15 = 60% (32–84)	15/15 = 100% (78–100)
	Positive predictive value	94% (91–96)	100%	96% (92–98)	100%
	Negative predictive value	58% (34–79)	75% (56–88)	69% (44–87)	79% (59–91)
	Diagnostic accuracy	91% (86–95)	97% (92–99)	93% (88–97)	97% (93–99)