Table 3.
Intraclass Correlation Coefficients between the activity trackers and gold standards in the laboratory and free–living study
| Laboratory study (N = 33) (Optogait) | 95 % confidence interval | Free–living study (N = 56) (ActivPAL) | 95 % confidence interval | |
|---|---|---|---|---|
| ActivPAL | 1 | 0.94 – 1 | ||
| Lumoback | 0.99 ** | 0.98 – 0.99 | 0.99 ** | 0.98 – 0.99 |
| Fitbit Flex | 0.22 * | −0.08 – 0.5 | 0.96 ** | 0.94 – 0.98 |
| Jawbone UP | 0.98 ** | .095 – 0.99 | 0.94 ** | 0.90 – 0.97 |
| Nike+ Fuelband | 0.12 | −0.1 – 0.37 | 0.83 ** | 0.37 – 0.94 |
| Misfit Shine | 0.97 ** | 0.93 – 0.98 | 0.99 ** | 0.98 – 0.99 |
| Withings Pulse | 0.99 ** | 0.95 – 0.97 | 0.96 ** | 0.91 – 0.98 |
| Fitbit Zip | 0.99 ** | 0.96 – 0.99 | 1 ** | 0.99 – 1 |
| Omron | 0.59 ** | 0.27 – 0.78 | 0.98 ** | 0.96 – 0.99 |
| Digiwalker | 0.65 ** | 0.39 – 0.81 | 0.96 ** | 0.93 – 0.98 |
| Moves app | −0.13 | −0.32 – 0.15 | 0.80 ** | 0.05 – 0.99 |
*P<0.05 **P<0.01