Table 6.
Performances of commercially available devices with electrocardiogram (ECG) sensors.
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Withings ScanWatch | Apple Watch [23] | Kardia Band [24] | MyDiagno-stick [25] | Samsung ECG Monitor [26] | Amazfit Health Band 1S [27] | Amazfit Cardidoc app [29] | Fitbit ECG app [28] | ||||||||||||||||||
| Patients recruited, n | 283 | 602 | 169 | 192 | 544 | 401 | 114 | 472 | ||||||||||||||||||
| Patients analyzed, n | 262 | 553 | 169 | 192 | 544 | 401 | 114 | 440 | ||||||||||||||||||
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Noise or unreadable, n (%) | 182 (6.9) | 49 (8.9) | 28 (16.6) | —a | — (16.8) | 15 (3.74) | 2 (1.75) | — | |||||||||||||||||
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Other or unclassifiable, n (%) | 33 (12.6) | 19 (3.4) | 29 (17.2) | — | — | — | — | — | |||||||||||||||||
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All, n/N (%) |
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Sensitivity | 77/100 (77.0) | 236/277 (85.2) | 63/91 (69.2) | — | —/— (87.1) | — | — | — | ||||||||||||||||
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Specificity | 109/118 (92.4) | 238/263 (90.5) | 37/78 (47.4) | — | —/— (82.5) | — | — | — | ||||||||||||||||
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Atrial fibrillation and normal sinus rhythm, n/N (%) |
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Sensitivity | 77/80 (96.3) | 236/240 (98.3) | 63/68 (92.6) | —/— (100) | —/— (98.1) | —/— (96.7) | —/— (88.7) | —/— (98.7) | ||||||||||||||||
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Specificity | 109/109 (100) | 237/238 (99.6) | 37/44 (84.1) | —/— (95.9) | —/— (100) | —/— (98.0) | —/— (100) | —/— (100) | ||||||||||||||||
aNo data were available.