Table 6.
Confusion matrices for the recognition of the activities along with the corresponding validation metrics for the five classifiers expressed in percent
| Classification | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lying | Sitting | Standing | Walking | SEN | SPE | PPV | NPV | F-score | CCR | ||
| H-FIS | |||||||||||
| Reference | Lying | 1022 | 37 | 2.8 | 12.2 | 95.2 | 99.7 | 94.5 | 99.8 % | 94.8 (96.9 ± 5.0) | 90.4 (91.4 ± 6.6) |
| Sitting | 37.3 | 11975 | 737.1 | 286.1 | 91.9 | 95.5 | 96.0 | 90.8 % | 93.9 (95.7 ± 8.4) | ||
| Standing | 22.2 | 245.3 | 2066 | 228.9 | 80.6 | 94.3 | 62.7 | 97.6 % | 70.5 (71.4 ± 11.3) | ||
| Walking | 0 | 211 | 490.9 | 6667.5 | 90.5 | 96.8 | 92.7 | 95.8 % | 91.6 (91.0 ± 6.0) | ||
| FIS-IMUBP | |||||||||||
| Reference | Lying | 1022 | 21.1 | 17.1 | 13.8 | 95.2 | 99.7 | 94.5 | 99.8 % | 94.8 (96.9 ± 5.0) | 89.4 (89.8 ± 5.9) |
| Sitting | 37.3 | 11729.9 | 940.9 | 327.4 | 90.0 | 95.4 | 95.9 | 88.9 % | 92.8 (93.6 ± 7.0) | ||
| Standing | 22.2 | 249.8 | 2060.6 | 229.8 | 80.4 | 93.4 | 59.2 | 97.6 % | 68.2 (68.2 ± 14.7) | ||
| Walking | 0 | 230.1 | 461.7 | 6677.6 | 90.6 | 96.6 | 92.1 | 95.9 % | 91.4 (91.0 ± 6.0) | ||
| Event-FIS | |||||||||||
| Reference | Lying | 1022 | 33.4 | 4.8 | 13.8 | 95.2 | 99.7 | 94.5 | 99.8 % | 94.8 (96.9 ± 5.0) | 81.9 (84.4 ± 12.0) |
| Sitting | 37.3 | 9829.6 | 2841.2 | 327.4 | 75.4 | 96.9 | 96.7 | 76.9 % | 84.7 (86.4 ± 29.5) | ||
| Standing | 22.2 | 139.3 | 2171.1 | 229.8 | 84.7 | 84.3 | 39.2 | 97.9 % | 53.6 (65.8 ± 36.7) | ||
| Walking | 0 | 167.9 | 523.9 | 6677.6 | 90.6 | 96.6 | 92.1 | 95.9 % | 91.4 (91.0 ± 6.0) | ||
| FIS-IMU | |||||||||||
| Reference | Lying | 1022 | 6.1 | 32.1 | 13.8 | 95.2 | 99.7 | 94.5 | 99.8 % | 94.8 (96.9 ± 5.0) | 87.1 (86.8 ± 6.2) |
| Sitting | 37.3 | 11231.1 | 1439.7 | 327.4 | 86.2 | 95.4 | 95.7 | 85.3 % | 90.7 (90.2 ± 8.0) | ||
| Standing | 22.2 | 301.7 | 2008.7 | 229.8 | 78.4 | 90.9 | 50.6 | 97.2 % | 61.5 (62.4 ± 23.0) | ||
| Walking | 0 | 201.9 | 489.9 | 6677.6 | 90.6 | 96.6 | 92.1 | 95.9 % | 91.4 (91.0 ± 6.0) | ||
| EPOCH | |||||||||||
| Reference | Lying | 892 | 120 | 28 | 24 | 83.8 | 99.3 | 84.5 | 99.3 % | 84.2 (90.7 ± 12.4) | 84.8 (84.0 ± 5.4) |
| Sitting | 124 | 11980 | 608 | 484 | 90.8 | 83.1 | 86.5 | 88.3 % | 88.6 (88.3 ± 10.6) | ||
| Standing | 40 | 1264 | 908 | 348 | 35.5 | 96.3 | 53.0 | 92.7 % | 42.5 (39.6 ± 15.9) | ||
| Walking | 0 | 484 | 168 | 6752 | 91.2 | 94.9 | 88.7 | 96.1 % | 90.0 (91.3 ± 6.0) | ||
Each confusion matrix is expressed in seconds
For the CCR and the F-score, the median and interquartile range are provided (computed across patients)
SEN Sensitivity, SPE Specificity, PPV Positive Predictive Value, NPV Negative Predictive Value, CCR Correct Classification Rate