Table 4.
Absolute step difference between manually counted steps and steps measured using each device during treadmill walking.
| Walking speed (km/h) | n | PiezoRx | Actigraph | Omron | |||
| Absolute step difference, % (SD)a | P value | Absolute step difference, % (SD)a | P value | Absolute step difference, % (SD)a | P value | ||
| 2.4 | 43 | 6.2 (10.6) | .62 | 66.6 (22.3) | <.001 | 61.3 (37.1) | <.001 |
| 3.2 | 43 | 2.5 (5.4) | .81 | 18.0 (17.2) | <.001 | 19.2 (27.7) | .04 |
| 4.0 | 42 | 1.0 (1.0) | 1.00 | 3.0 (6.5) | .20 | 1.8 (2.0) | 1.00 |
| 5.6 | 41 | 0.8 (0.6) | 1.00 | 1.3 (1.5) | .98 | 4.6 (16.3) | .05 |
| 6.4 | 38 | 1.0 (1.9) | 1.00 | 1.5 (2.4) | .84 | 2.7 (8.6) | .30 |
| 7.2 | 30 | 1.1 (1.2) | .86 | 1.4 (1.4) | .98 | 2.8 (7.6) | .28 |
| Overall | N/Ab | 2.2 (5.4) | .87 | 15.9 (26.8) | .50 | 15.0 (29.0) | .48 |
aThree decimal places were used for clarity when necessary.
bN/A: not applicable.