Table 6.
Hierarchical multiple regression model correlating sleep quality to psychological variables
| Variables | Sleep quality (PSQI) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Step 1 | Step 2 | Step 3 | ||||||||||
| B | CI 95% | r | p | B | CI 95% | r | p | B | CI 95% | r | p | |
| AGE | − 0.28 | − 0.23; − 0.04 | − 0.28 | 0.004 | − 0.26 | (− 0.22; − 0.03) | − 0.27 | 0.005 | 0.09 | (− 0.02; 0.12) | 0.13 | 0.21 |
| Medical coverage system | – | – | – | – | –0.34 | (− 9.01; − 2.74) | − 0.35 | 0.000 | − 0.19 | (− 5.86; − 0.96) | − 0.27 | 0.007 |
| Anxiety (HADS-A) | – | – | – | – | – | – | – | – | 0.08 | (− 0.36; 0.53) | 0.03 | 0.71 |
| Depression (HADS-D) | – | – | – | – | – | – | – | – | − 0.16 | (− 0.63; 0.32) | − 0.06 | 0.15 |
| Body image (BID) | – | – | – | – | – | – | – | – | 0.44 | (0.12; 0.35) | 0.38 | 0.000 |
| Self esteem (RSES) | – | – | – | – | – | – | – | – | − 0.42 | (− 0.41; − 0.03) | − 0.24 | 0.019 |
Values in bold: Significant association (p value < 0.05)
B standardized beta coefficient, CI 95% 95% confidence interval, r Spearman’s rank correlation coefficient, 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