TABLE 3.
Scoring agreement in each sleep stage across all 50 subjects.
| Standard five stages | N1 and N2 combined to light sleep | ||||
|---|---|---|---|---|---|
| Majority sleep stage | Mean agreement with majority scoring, % | Observed agreement, % | Majority sleep stage | Mean agreement with majority scoring, % | Observed agreement, % |
| All sleep stages | 86.3 | 79.1 | All sleep stages | 89.5 | 83.7 |
| Wake | 86.3 | 79.3 | Wake | 87.6 | 81.4 |
| N1 | 65.6 | 51.3 | Light sleep | 82.7 | 83.2 |
| N2 | 86.0 | 78.8 | |||
| N3 | 88.8 | 82.0 | N3 | 89.0 | 82.2 |
| REM | 91.7 | 86.5 | REM | 92.6 | 87.9 |
Abbreviation: REM, rapid eye movement.
Note: observed agreement was defined as the number of rater pairs in agreement relative to the number of all possible rater pairs that is, the observed agreement without being adjusted by chance agreement.