Table 16.
Mean error calculated for typical HRV measures after applying cubic spline interpolation and the proposed algorithms for various gap sizes (NEEDED database).
| Signal | Method | RMSSD | SDNN | SDSD | Total Power |
LF | HF | SD1 | SD2 |
|---|---|---|---|---|---|---|---|---|---|
| Gap w = 3 | Algorithm 2 | 0.21% | 0.07% | 0.21% | 0.71% | 1.60% | 3.17% | 0.21% | 0.09% |
| Cubic spline | 0.29% | 0.09% | 0.29% | 2.14% | 1.97% | 8.06% | 0.29% | 0.11% | |
| Gap w = 5 | Algorithm 2 | 0.35% | 0.08% | 0.35% | 0.93% | 1.80% | 4.48% | 0.35% | 0.01% |
| Cubic spline | 0.38% | 0.28% | 0.39% | 2.78% | 4.84% | 20.15% | 0.39% | 0.39% | |
| Gap w = 7 | Algorithm 2 | 0.42% | 0.08% | 0.43% | 0.90% | 2.16% | 5.60% | 0.43% | 0.11% |
| Cubic spline | 0.68% | 0.66% | 0.68% | 6.02% | 11.62% | 42.56% | 19.42068% | 0.95% |