Table 2.
Criterion Measurements and Fitbit Flex Output
| Mean (SD) |
|||||
| Variable | Criterion measurement | Fitbit Flex output | Mean difference | 95% CI | p-value |
| Distance walked, m | 246.1 (70.0) | 295.3 (95.7) | 49.1 | 5.9, 92.3 | 0.03 |
| Slower group | 200.9 (51.6) | 276.4 (74.5) | 75.5 | – | 0.01 |
| Faster group | 308.3 (32.0) | 321.3 (111.9) | 12.9 | – | 0.48 |
| Step count, no. steps | 504.3 (77.6) | 415.3 (135.9) | 89.1 | 138.0, 40.1 | 0.01 |
| Slower group | 464.6 (68.3) | 392.9 (111.2) | 71.6 | – | 0.02 |
| Faster group | 559.0 (50.3) | 446.0 (156.6) | 113.0 | – | 0.01 |
| Gait speed, m/s | 0.7 (0.2) | – | – | – | – |
| Slower group | 0.6 (0.1) | – | – | – | – |
| Faster group | 0.9 (0.1) | – | – | – | – |