Table 3. Number of AF cases detected by each device and diagnostic performance measures in comparison to ECG.
| AF (All) | AF (ECG) | Sens. | Spec. | PPV | NPV | AUC (ECG ref.) (IC 95%) |
|
|---|---|---|---|---|---|---|---|
| MyDiagnostick (n = 358) | 13 | 10 | 76.9% | 97.10% | 50% | 99.1% | 0.870 (0.734–1.00) |
|
WatchBP
(n = 357) |
15 | 11 | 84.6% | 94.5% | 36.7% | 99.4% | 0.895 (0.780–1.00) |
|
AliveCor
(n = 99) |
10 | 8 | 80% | 95.5% | 66.7% | 97.7% | 0.878 (0.729–1.00) |
|
Fibricheck
(n = 259) |
6 | 1 | 33.3% | 93.4% | 5.6% | 99.17% | 0.633 (0.267–1.00) |
NPV: Negative predictive value; PPV: Positive predictive value. The first column indicates the number of AF from the total detected by each device (here we count AF cases detected by Holter monitoring). The second column indicates the number of AF from the ones detected by ECG, also detected by each device. Sensitivity, specificity, PPV, NPV and AUC were calculated using the ECG as a reference.