Diagnostic Accuracy and Usability of the ECG247 Smart Heart Sensor Compared to Conventional Holter Technology

Table 3

Usability of ECG247 versus Holter technology in patients with long-term ECG recording, n = 120 (missing data in 31 patients).

	ECG247	Holter technology	Diff.
Mean usability score in different situations (SD)^1
Showering	2.8 (3.0)	7.0 (3.7)	4.2	<0.001
Training	1.6 (1.4)	4.6 (3.3)	3.0	<0.001
Sleeping	1.6 (1.2)	4.2 (2.7)	2.6	<0.001
Physical activity	1.2 (0.5)	2.9 (2.3)	1.7	<0.001
At work	1.1 (0.5)	2.4 (2.0)	1.3	<0.001
WC	1.0 (0.1)	2.2 (1.9)	1.2	<0.001
Social relations	1.1 (0.3)	2.2 (2.0)	1.1	<0.001
Eating	1.1 (0.4)	1.5 (1.1)	0.4	<0.001
Adverse events score^2
Itching	2.8 (2.5)	3.0 (2.7)	0.2	0.49
Erythema	2.9 (2.7)	3.1 (2.8)	0.2	0.59
System usability score^3	87.4 (1.4)	67.5 (1.8)	19.9	<0.001

¹Usability score: 1 (excellent)–10 (very poor). ²Adverse event score: 1 (no problem)–10 (not acceptable). ³System usability score: 0–100, >68 acceptable.