Table 2.
Mean scores (standard deviations) for global and subscales PSQI in the total study sample of “good sleepers” and “poor sleepers”.
| All Subjects (n = 201) |
Good Sleepers PSQI ≤ 5 (n = 48) (23.9%) |
Poor Sleepers PSQI > 5 (n = 153) (76.1%) |
Comparison z p |
||
|---|---|---|---|---|---|
| Global PSQI | 8.97 (4.27) | 3.64 (1.05) | 10.60 (3.49) | −10.38 | <0.001 |
| Subjective sleep quality | 1.42 (0.79) | 0.66 (0.48) | 1.65 (0.72) | −7.64 | <0.001 |
| Sleep latency | 1.66 (1.14) | 0.55 (0.62) | 2.00 (1.05) | −7.51 | <0.001 |
| Sleep duration | 1.33 (0.91) | 0.38 (0.53) | 1.62 (0.79) | −8.22 | <0.001 |
| Habitual sleep efficiency | 1.22 (1.16) | 0.17 (0.38) | 1.54 (1.12) | −7.41 | <0.001 |
| Sleep disturbances | 1.43 (0.62) | 1.02 (0.44) | 1.55 (0.62) | −5.21 | <0.001 |
| Use of sleep medications | 0.65 (1.14) | 0.17 (0.67) | 0.80 (1.22) | −3.60 | <0.001 |
| Daytime dysfunction | 1.29 (0.86) | 0.70 (0.62) | 1.46 ((0.84) | −5.44 | <0.001 |
Note: PSQI: Pittsburgh Sleep Quality Index.