Table 2.
The definition and statistical characteristics of the items, subscales, and scales
| Items/Subscales/Scales | mean | SD | skewness | kurtosis |
|---|---|---|---|---|
| The Insomnia Severity Index | 10.99 | 6.49 | 0.256 | 2.278 |
| Difficulty initiating sleep | 1.74 | 1.31 | 0.104 | 1.766 |
| Difficulty maintaining sleep | 1.40 | 1.26 | 0.435 | 2.056 |
| Early morning awakening | 1.32 | 1.18 | 0.457 | 2.111 |
| Dissatisfaction with sleep | 2.40 | 1.13 | −0.182 | 2.090 |
| Interference with daily functioning | 1.54 | 1.07 | 0.233 | 2.381 |
| Noticeability of impaired quality of life | 1.03 | 1.01 | 0.922 | 3.355 |
| Worrying about sleep | 1.56 | 1.15 | 0.328 | 2.301 |
| The Eysenck Personality Questionnaire | ||||
| Psychoticism | 5.39 | 2.96 | 0.661 | 2.975 |
| Extraversion | 6.90 | 4.55 | 0.59 | 2.633 |
| Neuroticism | 18.16 | 4.66 | −1.078 | 3.69 |
| The Interpersonal Relationship Comprehensive Diagnostic Scale | 14.25 | 5.78 | −0.214 | 2.486 |
| Conversation | 4.01 | 1.88 | −0.193 | 2.229 |
| Making friends | 4.96 | 1.89 | −0.825 | 2.809 |
| Manner of dealing with people | 2.55 | 1.66 | 0.549 | 2.805 |
| Heterosexual interactions | 2.73 | 1.89 | 0.053 | 1.911 |
| The Childhood Trauma Questionnaire-Short Form | 44.55 | 14.67 | 1.054 | 4.013 |
| Emotional abuse | 9.75 | 4.53 | 1.184 | 3.921 |
| Physical abuse | 7.13 | 3.42 | 2.373 | 9.160 |
| Sexual abuse | 5.92 | 2.10 | 3.440 | 17.435 |
| Emotional neglect | 13.27 | 5.57 | 0.230 | 2.011 |
| Physical neglect | 8.49 | 3.6 | 1.285 | 4.460 |
| The Social Support Rating Scale | 31.58 | 6.81 | 0.455 | 3.491 |
| Objective support | 8.53 | 2.84 | 0.464 | 3.598 |
| Subjective support | 16.66 | 3.9 | 0.525 | 3.005 |
| Utilization of support | 6.38 | 1.79 | 0.569 | 3.419 |
| 14-item Hamilton Depression Scale | 14.89 | 6.42 | −0.402 | 2.629 |
| 17-item Hamilton Depression Scale | 17.51 | 7.47 | −0.356 | 2.569 |
Notes: SD, standard deviation