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Overview study results.
| Variable | ECGa | PPGb |
| Number of Intervals | 20,298 | 20,298 |
| Average interval (ms) | 758.4 (351.6) | 758.2 (333.3) |
| Minimum value (ms) | 312.5 | 316.7 |
| Maximum value (ms) | 2223.0 | 2233.0 |
aECG: electrocardiography.
bPPG: photoplethysmography.
