Table 3.
Mean measured and estimated EE for each device
| Device (N) | Measured EE (kcal) | Estimated EE (kcal) | RMSE (kcal) | RMSE (%) |
|---|---|---|---|---|
| Shoes (17) | 478.1 (20.0) | 476.5 (18.4) | 29.6 | 6.2 |
| Actical* (19) | 503.3 (19.2) | 383.2 (16.9)a,b | 130.2 | 25.9 |
| Actical† (19) | 503.3 (19.2) | 558.2 (29.4) | 101.7 | 20.2 |
| Actical‡ (19) | 503.3 (19.2) | 527.9 (28.6) | 89.7 | 17.8 |
| Actigraph* (16) | 494.2 (20.0) | 375.0 (20.6)a,b | 132.6 | 26.8 |
| IDEEA (18) | 504.2 (20.3) | 445.3 (23.2) | 88.2 | 17.5 |
| Directlife*^ (19) | 455.4 (17.8) | 448.5 (13.1) | 62.1 | 13.6 |
| Fitbit (16) | 499.0 (23.8) | 362.8 (18.9)a,b | 143.2 | 28.7 |
| Fitbit-CL (16) | 499.0 (23.8) | 515.8 (13.0) | 64.3 | 12.9 |
Mean room-measured and device-estimated EE, standard error (SE) of the estimate, root mean squared error (RMSE) and %RMSE. Measured EE values differ due to different sample sizes and participants for each device.
*
Harris-Benedict equation adjustment.
†
Estimated EE from subject-specific linear regression model (Actical only, all activities).
‡
Estimated EE from subject specific linear regression model without cycling (Actical only).
^
3-hour comparison.
a
Significant difference from measured.
b
Significant difference from Shoes.
Fitbit-CL: Fitbit using manual classification.