Table 5.
Correlations between measures.
| Measure | Insomnia Severity Index (ISI) | PTSD | PHQ-9 | GAD-7 | SIPS | PDSS | AUDIT | DASS Depression | DASS Anxiety |
|---|---|---|---|---|---|---|---|---|---|
| PTSD | 0.52 ** | 1 | |||||||
| PHQ-9 | 0.64 ** | 0.74 ** | 1 | ||||||
| GAD-7 | 0.53 ** | 0.74 ** | 0.80 ** | 1 | |||||
| SIPS | 0.39 ** | 0.44 ** | 0.51 ** | 0.54 ** | 1 | ||||
| PDSS | 0.35 ** | 0.62 ** | 0.59 ** | 0.66 ** | 0.47 ** | 1 | |||
| AUDIT | 0.22 ** | 0.20 ** | 0.29 ** | 0.21 ** | 0.11 ** | 0.18 ** | 1 | ||
| DASS Depression | 0.52 ** | 0.77 ** | 0.85 ** | 0.81 ** | 0.50 ** | 0.63 ** | 0.26 ** | 1 | |
| DASS Anxiety | 0.48 ** | 0.76 ** | 0.78 ** | 0.80 ** | 0.54 ** | 0.65 ** | 0.22 ** | 0.88 ** | 1 |
| DASS Stress | 0.53 ** | 0.76 ** | 0.82 ** | 0.80 ** | 0.50 ** | 0.65 ** | 0.25 ** | 0.90 ** | 0.87 ** |
PTSD = posttraumatic stress disorder; DASS = depression, anxiety, and stress symptoms (DASS-21); GAD-7 = generalized anxiety disorder scale; PHQ-9 = patient health questionnaire; PDSS = panic disorder symptoms severity Scale; SIPS = social interaction phobia scale; AUDIT = alcohol use disorders identification test; ** p ≤ 0.01.