Table 2.
Sleep parameters on the control night and the test night.
| Control | Test | |
|---|---|---|
| TST/min | 390 (44) | 368 (54) |
| N1/min | 42 (16, 46) | 39 (17) |
| N2/min | 263 (52) | 248 (40) |
| N3/min | 21 (17) | 4 (0, 16)∗ |
| REM/min | 66 (22) | 70 (22) |
| N1% | 11.2 (4.0, 12.2) | 10.7 (4.3) |
| N2% | 67.1 (8.7) | 68.1 (7.6) |
| N3% | 5.2 (4.2) | 1.3 (0.0, 4.1) |
| REM% | 17.0 (5.6) | 18.4 (4.4) |
| ArI/h−1 | 15.1 (3.1) | 43.9 (9.1)† |
TST, total sleep time; N1, non-rapid-eye movement sleep stage 1; N2, non-rapid-eye movement sleep stage 2; N3, non-rapid-eye movement sleep stage 3; REM, rapid-eye movement sleep; N1%, the percentage of N1; N2%, the percentage of N2; N3%, the percentage of N3; REM%, the percentage of REM; ArI, arousal index; ∗P < 0.05 from control condition; †P < 0.001 from control condition.