Table 1.
Demographic and clinical characteristics of ID patients and HCs
| Characteristic | ID patients (n = 52) | HC (n = 30) | t value | p value |
|---|---|---|---|---|
| Age (year) a | 36.81 ± 9.60 | 35.23 ± 7.46 | 0.81 | 0.40 |
| Sex b | 0.61 | |||
| Male | 17 | 7 | ||
| Female | 35 | 23 | ||
| Education level b | 0.81 | |||
| Above Bachelor’s degree | 34 | 19 | ||
| Below Bachelor’s degree | 18 | 11 | ||
| PSQI a | 12.19 ± 2.30 | 1.00 ± 0.87 | 31.19 | < 0.01* |
| SL (PSQI, min) | 80.43 ± 38.04 | 14.30 ± 6.33 | 11.55 | < 0.01* |
| HAMA a | 10.79 ± 2.42 | 1.23 ± 1.00 | 24.68 | < 0.01* |
| HAS a | 43.60 ± 7.61 | 7.47 ± 3.80 | 28.93 | < 0.01* |
| SL (actigraphy, min) | 73.03 ± 39.16 | - | - | - |
Notes: Except for sex and education level, data for other characteristics are described as mean ± standard deviation. Abbreviations: PSQI, Pittsburgh Sleep Quality Index; HAMA, Hamilton Anxiety Rating Scale; HAS, Hyperarousal Scale; SL, sleep latency
*Significant difference between two groups
aTwo-sample t test
bChi-squared test