Table 1
Intraclass correlation for Apple Watch in cardiac patients with regular and irregular rhythm in HR and oxygen saturation at rest and after exercise.
| OUTCOMES | ICC (95% CI) | P VALUE | MEAN (SD) OF PRACTICAL (APPLE WATCH) | MEAN (SD) OF CRITERION (POLAR) |
|---|---|---|---|---|
| Heart rate | ||||
| Cardiac patients with regular rhythm | 0.100 (0.100–0.100) | <0.001 | 102.00 (8.06) | 101.97 (8.03) |
| Cardiac patients with irregular rhythm | 0.100 (0.100–0.100) | <0.001 | 106.67 (9.70) | 106.63 (9.73) |
| All cardiac patients | 0.100 (0.100–0.100) | <0.001 | 103.25 (8.77) | 103.24 (8.75) |
| MEAN (SD) OF PRACTICAL (APPLE WATCH) | MEAN (SD) OF CRITERION (CONTEC) | |||
| SpO2 at rest | ||||
| Cardiac patients with regular rhythm | 0.98 (0.94–0.99) | <0.001 | 97.04 (1.09) | 96.91 (0.99) |
| Cardiac patients with irregular rhythm | 0.99 (0.93–0.100) | <0.001 | 96.86 (0.84) | 96.80 (0.73) |
| All cardiac patients | 0.98 (0.95–0.99) | <0.001 | 96.99 (1.08) | 96.88 (0.91) |
| SpO2 after exercise | ||||
| Cardiac patients with regular rhythm | 0.94 (0.79–0.97) | 0.02 | 97.54 (0.84) | 97.33 (0.75) |
| Cardiac patients with irregular rhythm | 0.85 (0.15–0.97) | <0.001 | 97.14 (0.78) | 97.03 (0.50) |
| All cardiac patients | 0.92 (0.80–0.97) | <0.001 | 97.27 (0.69) | 97.43 (0.83) |
[i] CI, confidence interval; ICC, intraclass correlation coefficient.
Figure 1
Heart rate for all cardiac patients.
Figure 2
Oxygen saturation of all cardiac patients at rest.
Figure 3
Oxygen saturation of all cardiac patients after exercise.