TABLE 2.
Mean (SE) PSQI total and component scores by group condition and mixed model analysis.
| PSQI | Bright white light | Dim red light | ||||||||
|
|
|
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| Baseline N = 22 |
C1TW N = 17 |
C1RW N = 18 |
C4TW N = 16 |
C4RW N = 15 |
Baseline N = 16 |
C1TW N = 14 |
C1RW N = 13 |
C4TW N = 14 |
C4RW N = 14 |
|
| Global | 8.9 (0.9) |
9.1 (0.8) |
8.6 (1.0) |
8.5 (0.9) |
6.9 (0.9) |
7.9 (0.9) |
8.1 (1.1) |
7.1 (1.3) |
7.9 (0.9) |
6.9 (1.1) |
| Subjective sleep quality | 1.3 (0.2) |
1.4 (0.2) |
1.0 (0.2) |
0.9 (0.2) |
0.4** (0.1) |
1.6 (0.2) |
1.4 (0.3) |
1.0* (0.3) |
1.1 (0.2) |
0.9* (0.2) |
| Sleep latency | 1.4 (0.2) |
1.4 (0.2) |
1.4 (0.2) |
0.9 (0.3) |
0.8 (0.3) |
1.5 (0.3) |
1.1 (0.3) |
1.2 (0.3) |
1.0 (0.3) |
1.3 (0.3) |
| Sleep duration | 1.3 (0.2) |
0.9 (0.2) |
0.9 (0.2 |
0.9 (0.2) |
0.9* (0.2) |
0.8 (0.1) |
0.8 (0.2) |
0.5 (0.2) |
0.4 (0.2) |
0.5 (0.1) |
| Habitual sleep efficiency | 1.8 (0.3) |
1.9 (0.3) |
1.3 (0.3) |
1.6 (0.3) |
1.1 (0.3) |
1.3 (0.3) |
0.9 (0.3) |
0.9 (0.3) |
1.2 (0.4) |
0.7 (0.3) |
| Sleep disturbances | 1.5 (0.1) |
1.4 (0.2) |
1.2 (0.1) |
1.3 (0.2) |
1.1* (0.2) |
1.6 (0.1) |
1.5 (0.2) |
1.4 (0.1) |
1.7 (0.2) |
1.5 (0.1) |
| Use of sleeping medication | 1.1 (0.3) |
1.4 (0.4) |
1.7 (0.3) |
1.8 (0.4) |
1.6 (0.4) |
0.7 (0.3) |
1.5* (0.4) |
1.3 (0.4) |
1.4* (0.4) |
1.2 (0.4) |
| Daytime dysfunction | 0.6 (0.2) |
0.8 (0.2) |
0.9 (0.2) |
1.1* (0.1) |
1.0* (0.2) |
0.6 (0.2) |
0.9 (0.2) |
0.7 (0.2) |
1.0 (0.2) |
0.8 (0.2) |
Compared to Baseline in each group: *p < 0.05, **p < 0.01; there were no significant group by time interactions for both groups at any time point (all p’s > 0.1).