Table 7.
Mean absolute error (MAE) between reference blood pressure (BP) versus BP calibrated from scale pulse transit time (PTT), wrist PTT, and pulse arrival time (PAT) (mean +/− SE). DP: diastolic BP. SP: systolic BP. ǂp < 0.025 with respect to PAT (paired t-test).
| [mmHg] | DP | SP | |||
|---|---|---|---|---|---|
| Green PPG | IR PPG | Green PPG | IR PPG | ||
| Scale PTT | PTTS1 | 5.8 +/− 0.3 | 6.2 +/− 0.3 | 9.1 +/− 0.7 | 9.0 +/− 0.5 |
| PTTS2 | 5.7 +/− 0.4 | 6.1 +/− 0.4 | 9.0 +/− 0.7 | 9.2 +/− 0.6 | |
| Wrist PTT | PTTW1 | 5.5 +/− 0.4 | 5.8 +/− 0.3ǂ | 8.3 +/− 0.5 | 8.4 +/− 0.5 |
| PTTW2 | 5.1 +/− 0.3ǂ | 5.3 +/− 0.4ǂ | 7.6 +/− 0.5 | 8.0 +/− 0.7 | |
| PAT | 6.5 +/− 0.4 | 7.4 +/− 0.5 | 8.6 +/− 0.6 | 9.4 +/− 0.9 | |