TABLE 2.
Mean (SD) and Effects for Diagnostic Group, Night, and Group × Night for Objective Sleep Quality Variables
| Night 1 |
Night 2 |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Variable | Control | ANX | MDD | Control | ANX | MDD | Group | Night | Group × Night |
| Total sleep time (min) | 538.3 (34.9) | 529.9 (85.6) | 524.5 (35.5) | 558.0 (33.9) | 525.3 (45.2) | 546.0 (38.8) | 2.11 | 1.70 | 0.80 |
| Awakenings | 5.8 (2.8) | 8.3 (4.0) | 5.4 (3.2) | 6.1 (3.1) | 6.4 (3.4) | 5.2 (3.6) | 3.08** | 0.19 | 0.59 |
| Time awake (min) | 44.6 (38.3) | 27.7 (27.9) | 28.9 (27.7) | 26.6 (28.2) | 13.3 (14.0) | 19.2 (22.6) | 4.86** | 0.47 | 0.32 |
| Sleep latency (min) | 25.6 (15.4) | 35.7 (36.7) | 30.0 (18.5) | 19.4 (15.7) | 41.3 (28.7) | 21.9 (11.7) | 3.96** | 6.65** | 2.10 |
| Total REM time (min) | 90.4 (23.2) | 101.1 (33.1) | 93.7 (27.7) | 113.9 (22.0) | 106.0 (19.8) | 112.0 (25.0) | 0.32 | 8.62*** | 1.82 |
| REM latency (min) | 144.6 (47.4) | 113.2 (49.8) | 134.8 (55.5) | 118.3 (48.0) | 128.0 (55.9) | 111.5 (43.3) | 0.88 | 0.86 | 2.60* |
| REM density | 1.4 (0.5) | 1.3 (0.4) | 1.4 (0.5) | 1.5 (.5) | 1.2 (0.3) | 1.4 (0.5) | 1.62 | 11.88*** | 0.99 |
| Stage 1 sleep (min) | 24.5 (15.9) | 27.8 (13.4) | 20.7 (12.6) | 24.7 (15.2) | 27.4 (9.9) | 20.7 (12.1) | 4.01** | 0.15 | 0.44 |
| Stage 2 sleep (min) | 262.9 (50.6) | 298.9 (61.6) | 261.8 (40.3) | 275.8 (40.9) | 292.4 (20.8) | 277.0 (39.8) | 3.02** | 0.48 | 1.19 |
| Stage 3 sleep (min) | 40.8 (20.6) | 36.6 (14.8) | 39.4 (19.9) | 40.3 (15.4) | 33.0 (11.9) | 38.8 (18.8) | 0.05 | 0.64 | 0.32 |
| Stage 4 sleep (min) | 74.9 (32.5) | 41.8 (35.8) | 80.0 (31.8) | 76.6 (33.7) | 53.3 (33.1) | 78.2 (34.9) | 6.84*** | 0.04 | 0.64 |
| Slow-wave sleep (min) | 115.7 (40.1) | 78.4 (37.9) | 119.4 (37.3) | 117.0 (36.8) | 86.3 (29.4) | 116.9 (35.9) | 6.23*** | 0.40 | 0.42 |
Note: Values for group, night, group × night are F. Slow-wave sleep = stage 3 + stage 4. For rapid eye movement (REM) variables, df = 1,171 for night and 2,171 for group and group × night. For all others, df = 1,172 for night and 2,172 for group and group × night. All of the variables except total REM time, stage 2 sleep, stage 4 sleep, and slow-wave sleep were log-transformed before analyses.
*
p < .10;
**
p ≤.05;
***
p < .005.