Table 3
Performance comparison with other works
| Work | Signals used | Method | Calibration | Real-time ability | SBP average error (mmHg) | DBP average error (mmHg) |
| Our work | Ultrasound | SVR | No | 2.42±2.45 | 0.07±4.26 | |
| PTT&PIR [5] | ECG&PPG | PWV-formula | Yes | √ | 0.08±4.06 | −0.18±4.13 |
| Muti-parameter [6] | ECG&PPG | ANN | Yes | × | 1.27±5.98 | −1.38±5.49 |
| Wearable ultrasonic sensor [9] | Ultrasound | Diameter-Formula | Yes | × | 0.32±1.45 | −1.97±2.42 |
| Business equipment | Pressure & PPG | Direct measurement | No | × | ±3 | ±3 |
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