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Contingency table for all participants
| Scenario 1 | Wake/N1 [scalp] | N2/N3 [scalp] |
|---|---|---|
| Wake/N1 [ear] | 124 (34.4%) | 25 (6.9%) |
| N2/N3 [ear] | 36 (10.0%) | 175 (48.6%) |
| Scenario 2 | Wake [scalp] | Sleep [scalp] |
|---|---|---|
| Wake [ear] | 70 (19.4%) | 22 (6.1%) |
| Sleep [ear] | 36 (10.0%) | 232 (64.4%) |
Kappa coefficient: scenario 1: 0.65 (95% CI, 0.58–0.73); scenario 2: 0.60 (95% CI, 0.50–0.69).
Scenario 1: wake and light sleep (Wake/N1) versus N2/N3 sleep (stages N2 and N3).
Scenario 2: wake versus sleep (N1, N2 and N3).
