Table 3.
Mean and standard deviation of the IBIs derived through ENVELOPE and SLOPE approaches; 95% limits of agreement (LOA) calculated between RRIs and each series of IBIs. Assessment performed with PPG signals sampled at 64 Hz.
| RRI | IBI SLOPE | IBI ENVELOPE | ||
|---|---|---|---|---|
| Sit | Mean ± SD (ms) | 795.0 ± 90.3 | 795.0 ± 91.4 | 795.0 ± 91.9 |
| 95% LOA (ms) | - | ±15.4 | ±15.6 | |
| Stand | Mean ± SD (ms) | 681.4 ± 67.8 | 681.4 ± 69.2 | 681.4 ± 69.4 |
| 95% LOA (ms) | - | ±17.0 | ±15.9 | |
| CR | Mean ± SD (ms) | 797.8 ± 98.9 | 797.8 ± 99.9 | 797.8 ± 100.5 |
| 95% LOA (ms) | - | ±17.1 | ±16.7 |