Table 2.
Percentage relative errors of heart rate variability (HRV) parameter measurements.
| Error % | Smartphone IoTool vs. Polar V800 |
|---|---|
| Dairy Cow I | |
| RR interval (ms) | 0.12 |
| SDNN (ms) | 4.70 |
| rMSSD (ms) | 5.53 |
| Dairy Cow II | |
| RR interval (ms) | 0.27 |
| SDNN (ms) | 2.01 |
| rMSSD (ms) | 8.67 |
| Human control data | |
| RR interval (ms) | 0.11 |
| SDNN (ms) | 0.49 |
| rMSSD (ms) | 0.05 |
RR interval: distance between successive R waves; SDNN: standard deviation of all RR intervals; rMSSD: Square root of the mean of the sum of all differences between adjacent RR intervals.