Table 2.
Sleep stage data.
| Sleep group n = 20 |
PSD group n = 21 |
Group comparison | ||
|---|---|---|---|---|
| 1st night half | TST | 215.22 (8.73) | 214.95 (12.10) | t(39) = 0.08, p= .934, d = 0.03 |
| N1 | 29.75 (18.23) | 24.90 (13.58) | F(1,39) = 0.92, p = .342, η2p = 0.02 | |
| N2 | 96.23 (22.75) | 107.67 (16.96) | F(1,39) = 3.27, p = .078, η2p = 0.08 | |
| N3 | 65.67 (15.23) | 61.68 (20.44) | F(1,39) = 0.50, p = .482, η2p = 0.01 | |
| REM | 23.52 (12.48) | 20.70 (11.33) | F(1,39) = 0.57, p = .453, η2p = 0.02 | |
| WAKE | 13.11 (8.07) | 14.05 (11.96) | F(1,39) = 0.09, p = .769, η2p = 0.01 | |
| 2nd night half | TST | 217.86 (7.24) | - | - |
| N1 | 37.87 (16.50) | - | - | |
| N2 | 104.22 (17.45) | - | - | |
| N3 | 11.21 (10.23) | - | - | |
| REM | 64.56 (11.41) | - | - | |
| WAKE | 9.46 (7.60) | - | - | |
| Total | TST | 433.08 (12.47) | 214.95 (12.10) | t(39) = 56.82, p < .001, d = 17.75 |
| N1 | 67.62 (33.23) | 24.90 (13.58) | F(1,39) = 28.49, p < .001, η2p = 0.42 | |
| N2 | 200.51 (35.69) | 107.67 (16.96) | F(1,39) = 111.31, p < .001, η2p = 0.74 | |
| N3 | 76.87 (22.79) | 61.68 (20.44) | F(1,39) = 5.03, p = .031, η2p = 0.11 | |
| REM | 88.08 (17.92) | 20.70 (11.33) | F(1,39) = 204.75, p < .001, η2p = 0.84 | |
| WAKE | 22.57 (11.93) | 14.05 (11.96) | F(1,39) = 5.21, p = .028, η2p = 0.12 | |
| % TST | N1 | 15.63 (7.63) | 11.55 (6.29) | F(1,39) = 3.45, p = .071, η2p = 0.08 |
| N2 | 46.32 (8.27) | 49.99 (6.84) | F(1,39) = 2.39, p = .130, η2p = 0.06 | |
| N3 | 17.72 (5.12) | 28.81 (9.79) | F(1,39) = 20.93, p < .001, η2p = 0.35 | |
| REM | 20.33 (4.01) | 9.65 (5.40) | F(1,39) = 52.11, p < .001, η2p = 0.57 |
TST = Total sleep time, WAKE = Wake after sleep onset, N1 = NREM Stage 1, N2 = NREM Stage 2, N3 = NREM Stage 3 (corresponding to SWS), REM = REM sleep; means and standard deviations are given in parentheses, all p-values reflect two-sided tests.