Table 2. Data on normalized PTT and PEP variability.
| Normalized PTT in % (PTT mean in ms) |
SD PTT in % of PTT (PTT SD in ms) |
% of PEP with respect to PTT | % of SD PEP with respect to PTT | |
|---|---|---|---|---|
| 1 | 100 (305) | 1.6 (5) | 22.4 | 1.1 |
| 2 | 100 (272) | 2.6 (7) | 25.8 | 1.1 |
| 3 | 100 (285) | 2.5 (7) | 28.3 | 0.9 |
| 4 | 100 (299) | 1.7 (5) | 18.5 | 1.3 |
| 5 | 100 (309) | 1.9 (6) | 16.1 | 1.3 |
| 6 | 100 (268) | 1.1 (3) | 21.8 | 1.3 |
| 7 | 100 (266) | 1.9 (5) | 20.7 | 1.5 |
| 8 | 100 (286) | 1.0 (3) | 17.9 | 0.8 |
| 9 | 100 (230) | 1.7 (4) | 23.8 | 1.3 |
| 10 | 100 (270) | 1.9 (5) | 25.9 | 1.5 |
| 11 | 100 (272) | 1.1 (3) | 14.9 | 1.2 |
| 12 | 100 (274) | 0.7 (2) | 18.3 | 1.2 |
| 13 | 100 (247) | 4.5 (11) | 29.9 | 1.7 |
| 14 | 100 (271) | 3.3 (9) | 19.6 | 0.7 |
| 15 | 100 (292) | 1.0 (3) | 22.5 | 1.2 |
| 16 | 100 (240) | 5.8 (14) | 17.5 | 1.3 |
| 17 | 100 (330) | 2.7 (9) | 24.2 | 1.7 |
| 18 | 100 (294) | 2.0 (6) | 12.7 | 1.5 |
| 19 | 100 (276) | 5.4 (15) | 16.7 | 2.1 |
| 20 | 100 (315) | 3.8 (12) | 22 | 1.2 |
| Mean group | 100 | 2.4 | 21.0 | 1.3 |
Values are normalized as percentage (%) of the PTT sensor of the index finger of the right hand group 1 (control group <50 years). The PTT mean ± SD (in ms) of 10 consecutive heartbeats are given for each person. For calculation of the normalized data see Formula 1. In group 1 the normalized PTT showed a significant difference between the left and right hand, respectively 100%±3.1% versus 100%±2.4% (p = 0.004).