Table 1.
Mean (± SD) Sleep Sensitivity, Specificity, and Accuracy of Epoch-by-Epoch Comparison with PSG of 4 Actigraphy Scoring Algorithms in 3 Sleep Conditions (N=15)
| Statistical parameters | Sleep conditions1 | Scoring algorithms2 |
|||
|---|---|---|---|---|---|
| Act40 | Act20 | LötEq | LötMt | ||
| Sensitivity (%) | NS | 95.3 (2.6) | 91.4 (3.8) | 94.6 (3.5) | 94.8 (3.1) |
| DRS | 96.0 (2.2) | 92.3 (3.4) | 96.0 (2.6) | 95.8 (2.9) | |
| CDRS | 96.0 (2.6) | 93.3 (3.5) | 95.3 (2.5) | 95.0 (3.3) | |
| Specificity (%) | NS | 54.3 (21.6) | 65.3 (18.2) | 47.3 (18.2) | 52.6 (20.8) |
| DRS | 45.1 (20.2) | 54.9 (21.7) | 47.1 (24.5) | 49.8 (23.6) | |
| CDRS | 37.3 (15.7) | 47.8 (16.5) | 48.5 (20.3) | 49.4 (19.2) | |
| Accuracy (%) | NS | 90.7 (4.7) | 88.2 (4.0) | 90.3 (3.6) | 90.6 (3.6) |
| DRS | 84.0 (9.2) | 83.3 (6.6) | 85.6 (6.3) | 86.2 (5.8) | |
| CDRS | 71.7 (15.4) | 74.2 (12.4) | 76.8 (12.5) | 77.5 (11.7) | |
1
NS, night sleep; DRS, day recovery sleep; CDRS, caffeine day recovery sleep
2
Act40, Actiware medium threshold algorithm; Act20, Actiware low threshold algorithm; LötEq, Lötjönen et al's equation algorithm; LötMt, Lötjönen et al's method algorithm