Table 3.
Agreement of each wrist cut point compared to the hip reference.
| Activity intensity |
Johansson Wrist | ROCa analysis | OLRb model | K-means analysis | |
| Sedentary behavior | |||||
|
|
Sensitivity (%) | 81.36 | 77.82 | 90.95 | 71.64 |
| Specificity (%) | 72.77 | 77.82 | 52.78 | 85.07 | |
| FPR (%) | 27.23 | 22.18 | 47.22 | 14.93 | |
| FNR (%) | 18.64 | 22.18 | 9.05 | 28.36 | |
| Kappa | 0.53 | 0.54 | 0.47 | 0.53 | |
| Light physical activity | |||||
|
|
Sensitivity (%) | 67.34 | 26.80 | 43.27 | 50.90 |
| Specificity (%) | 75.69 | 87.50 | 86.47 | 76.81 | |
| FPR (%) | 24.31 | 12.50 | 56.73 | 23.19 | |
| FNR (%) | 32.66 | 73.20 | 13.53 | 49.10 | |
| Kappa | 0.39 | 0.16 | 0.32 | 0.27 | |
| Moderate physical activity | |||||
|
|
Sensitivity (%) | N/Ac | 4.47 | 8.83 | 48.42 |
| Specificity (%) | N/A | 96.79 | 99.06 | 86.79 | |
| FPR (%) | N/A | 3.21 | 0.96 | 13.21 | |
| FNR (%) | N/A | 95.53 | 76.11 | 51.58 | |
| Kappa | N/A | 0.02 | 0.12 | 0.19 | |
| Vigorous physical activity | |||||
|
|
Sensitivity (%) | N/A | 79.00 | 23.89 | 33.94 |
| Specificity (%) | N/A | 79.00 | 99.04 | 98.17 | |
| FPR (%) | N/A | 21.00 | 0.96 | 1.83 | |
| FNR (%) | N/A | 21.00 | 76.11 | 66.06 | |
| Kappa | N/A | 0.11 | 0.28 | 0.31 | |
| Moderate-to-vigorous physical activity | |||||
|
|
Sensitivity (%) | 16.02 | 78.89 | 24.27 | 68.37 |
| Specificity (%) | 99.53 | 78.92 | 98.96 | 86.58 | |
| FPR (%) | 0.47 | 21.08 | 1.04 | 13.42 | |
| FNR (%) | 83.98 | 21.11 | 75.73 | 31.63 | |
| Kappa | 0.24 | 0.28 | 0.33 | 0.35 | |
| Overall agreement | |||||
|
|
Correct classification (%) | N/A | 59.51 | 71.51 | 63.68 |
| Kappa | N/A | 0.30 | 0.37 | 0.37 | |
| Overall agreement when MPA and VPA were grouped together | |||||
|
|
Correct classification (%) | 72.30 | 63.63 | 72.37 | 65.58 |
| Kappa | 0.45 | 0.35 | 0.39 | 0.40 | |
aROC: Receiver operating characteristic.
bOLR: Ordinal logistic regression.
cN/A: Not applicable.