Table 4.
Intercorrelations between the various variables of the study
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Subjective sleep quality | – | |||||||||||
| 2. Sleep latency | 0.770** | – | ||||||||||
| 3. Sleep duration Usual | 0.664** | 0.650** | – | |||||||||
| 4. Sleep efficiency | 0.635** | 0.598** | 0.703** | – | ||||||||
| 5. Sleep disturbances | 0.747** | 0.579** | 0.552** | 0.560** | – | |||||||
| 6. Use of sleep medications | 0.122 | − 0.032 | − 0.039 | − 0.030 | 0.331* | – | ||||||
| 7. Daytime dysfunction | 0.747** | 0.660** | 0.522** | 0.486** | 0.530** | 0.034 | – | |||||
| 8. PSQI overall score | 0.905** | 0.841** | 0.781** | 0.765** | 0.810** | 0.170 | 0.776** | – | ||||
| 9. Anxiety (HADS-A) | 0.656** | 0.529** | 0.365* | 0.329* | 0.518** | 0.002 | 0.489** | 0.584** | – | |||
| 10. Depression (HADS-D) | 0.688** | 0.496** | 0.333* | 0.313 | 0.581** | 0.151 | 0.439** | 0.596** | 0.954** | – | ||
| 11. Body image (BID) | 0.541** | 0.260 | 0.296 | 0.358* | 0.425** | 0.051 | 0.367* | 0.448** | 0.396* | 0.489** | – | |
| 12. Self esteem (RSES) | − 0.702** | − 0.497** | − 0.334* | − 0.323* | − 0.519** | − 0.116 | − 0.384* | − 0.568** | − 0.865** | − 0.913** | − 0.423** | – |
HADS-A Hospital Anxiety and Depression Scale-Anxiety, HADS-D Hospital Anxiety and Depression Scale-Depression, BID body image dissatisfaction, RSE Rosenberg's Self-Esteem Scale, PSQI Pittsburgh Sleep Quality Index
*p < 0.05; **p < 0.001. Spearman's rank correlation coefficient