Table 2.
Sleep quality and the psychological distress of the participants
| Variables | Total n (n = 123) | PSQI > 7 (n = 47) | PSQI ≤ 7 (n = 76) | t/χ 2-value |
|---|---|---|---|---|
| Global PSQI score (mean ± SD) | 7.22 ± 2.62 | 9.87 ± 1.98 | 5.58 ± 1.26 | 13.274*** |
| Sleep quality | 1.04 ± 0.66 | 1.47 ± 0.65 | 0.78 ± 0.51 | 6.192*** |
| Sleep latency | 1.37 ± 0.85 | 1.85 ± 0.98 | 1.08 ± 0.61 | 4.868*** |
| sleep duration | 1.03 ± 0.79 | 1.47 ± 0.83 | 0.76 ± 0.63 | 5.000*** |
| Sleep efficiency | 0.59 ± 0.77 | 0.96 ± 0.86 | 0.37 ± 0.61 | 4.449*** |
| Sleep disturbance | 0.88 ± 0.57 | 1.09 ± 0.58 | 0.75 ± 0.52 | 3.315** |
| Use of sleeping medication | 0.03 ± 0.18 | 0.06 ± 0.247 | 0.01 ± 0.12 | 1.321 |
| Daytime dysfunction | 1.16 ± 1.07 | 1.34 ± 1.19 | 1.05 ± 0.98 | 1.397 |
| SAS (mean ± SD) | 34.44 ± 7.21 | 38.83 ± 9.02 | 34.97 ± 5.37 | 2.65** |
| SDS (mean ± SD) | 45.67 ± 8.67 | 49.93 ± 10.57 | 43.03 ± 5.94 | 4.09*** |
| Anxiety (SAS standard score ≥ 50), n (%) | 8 (17.0) | 1 (1.3) | 10.563** | |
| Depression (SDS standard score ≥ 50), n (%) | 21 (44.7) | 10 (13.2) | 15.308*** |
Mean ± SD, mean and standard deviation.
**P < 0.01; ***P < 0.001.