Table 2.
Means (SD), correlations, median absolute difference, and bland altman output for each device on the constructs of steps, MVPA, TDEE and sleep
| Nike fuelband | Striiv smart pedometer | Misfit shine | Jawbone UP | Withings pulse | Fitbit zip | Fitbit one | ||
|---|---|---|---|---|---|---|---|---|
| STEPS | Reference | BS | GT3X+ | BS | BS | GT3X+ | GT3X+ | GT3X+ |
| Reference mean (SD) | 9959 (4844) | 10516 (5070) | 9959 (4844) | 9959 (4844) | 10516 (5070) | 10516 (5070) | 10516 (5070) | |
| r | 0.94 | 0.99 | 0.94 | 0.97 | 0.99 | 0.99 | 0.99 | |
| ICC | 0.80 | 0.95 | 0.90 | 0.97 | 0.99 | 0.98 | 0.95 | |
| MAD | 2551 | 679 | 1002 | 806 | 660 | 447 | 779 | |
| Range of differences | -5309 to +143 | -679 to +1887 | -4693 to +1804 | -1978 to +2252 | -2386 to +832 | -970 to +1596 | -890 to +1849 | |
| Bias | -2529 | 675 | -1054 | -251 | -632 | 464 | 584 | |
| LoA (U) | 910 | 2089 | 2288 | 1889 | 663 | 1799 | 1980 | |
| LoA (L) | -5968 | -739 | -4395 | -2391 | -1927 | -871 | -813 | |
| MVPA (min) | Reference | GT3X+ | GT3X+ | GT3X+ | GT3X+ | GT3X+ | ||
| Reference mean (SD) | 58.5 (37.6) | 58.5 (37.6) | 58.5 (37.6) | 58.5 (37.6) | 58.5 (37.6) | |||
| r | 0.52 | 0.79 | 0.81 | 0.88 | 0.91 | |||
| ICC | 0.08 | 0.79 | 0.70 | 0.36 | 0.46 | |||
| MAD | 174.3 | 15.2 | 18.0 | 89.8 | 58.6 | |||
| Range of differences | +77.0 to +299.3 | -79.7 to +36.3 | -4.7 to +96.5 | +10.0 to +157.2 | +1.0 to +137.2 | |||
| Bias | 190.4 | -5.2 | 22.7 | 85.7 | 65.9 | |||
| LoA (U) | 344.9 | 45.3 | 68.2 | 172.1 | 154.9 | |||
| LoA (L) | 35.9 | -55.8 | -22.7 | -0.8 | -23.2 | |||
| TDEE (kcal) | Reference | BS | BS | BS | BS | BS | ||
| Reference mean (SD) | 3005 (569) | 3005 (569) | 3005 (569) | 3005 (569) | 3005 (569) | |||
| r | 0.79 | 0.74 | 0.79 | 0.81 | 0.76 | |||
| ICC | 0.51 | 0.27 | 0.54 | 0.57 | 0.55 | |||
| MAD | 468 | 866 | 415 | 484 | 349 | |||
| Range of differences | -996 to +100 | =1937 to -94 | -1284 to -58 | -1145 to +218 | -1724 to -83 | |||
| Bias | -479 | -898 | -533 | -497 | -475 | |||
| LoA (U) | 214 | -150 | 170 | 158 | 265 | |||
| LoA (L) | -1172 | -1647 | -1236 | -1152 | -1216 | |||
| SLEEP (min) | Reference | BS | BS | BS | BS | |||
| Reference mean (SD) | 423.6 (73.5) | 423.6 (73.5) | 423.6 (73.5) | 423.6 (73.5) | ||||
| r | 0.82 | 0.89 | 0.92 | 0.92 | ||||
| ICC | 0.71 | 0.85 | 0.87 | 0.90 | ||||
| MAD | 47.0 | 22.0 | 28.0 | 23.0 | ||||
| Range of differences | -61 to +125 | -31 to +132 | -17 to +104 | -45 to +76 | ||||
| Bias | 44.2 | 23.5 | 24.4 | 15.9 | ||||
| LoA (U) | 135.3 | 96.2 | 95.2 | 82.9 | ||||
| LoA (L) | -46.9 | -49.2 | -46.5 | -51.0 |
Note: BS = BodyMedia SenseWear; GT3X + = ActiGraph GT3X+; MVPA = Moderate to Vigorous Physical Activity; MAD = Median Absolute Difference; LoA (U) = Limits of Agreement (Upper); LoA (L) = Limits of Agreement (Lower); TDEE = Total Daily Energy Expenditure.