Table 2.
Classification results between Somnolyzer 24 × 7 and comparison scorings (Zeo, Expert and SleepExplorer)
| Wake | REM | Light | Deep | |||
|---|---|---|---|---|---|---|
| Zeo | ||||||
| % OA | 72.6 | Sensitivity | 40.8 | 73.7 | 80.0 | 62.1 |
| Cohen’s kappa | 0.56 | PPV | 32.0 | 67.4 | 79.2 | 82.2 |
| Expert | ||||||
| % OA | 80.9 | Sensitivity | 70.1 | 80.1 | 86.4 | 69.8 |
| Cohen’s kappa | 0.69 | PPV | 53.1 | 81.6 | 82.4 | 93.7 |
| SleepExplorer | ||||||
| % OA | 74.2 | Sensitivity | 83.4 | 74.2 | 75.3 | 67.2 |
| Cohen’s kappa | 0.61 | PPV | 37.7 | 70.2 | 83.4 | 91.3 |
% OA percent overall agreement, sensitivity percentage of actual sleep state epochs that are labelled as sleep state epochs by classifier, PPV positive predictive value (percentage of epochs labelled as sleep state that are correctly labelled)