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Correlations between the ESS and other scales.
| Scale | r |
|---|---|
| PSQI | |
| Sleep problems | 0.23 |
|
| |
| FAS | |
| Fatigue | 0.44 |
|
| |
| HADS | |
| Anxiety | 0.23 |
| Depression | 0.28 |
|
| |
| SF-8 | |
| Physical functioning | −0.28 |
| Role-physical | −0.32 |
| Bodily pain | −0.25 |
| General health | −0.25 |
| Vitality | −0.27 |
| Social functioning | −0.30 |
| Role-emotional | −0.32 |
| Mental health | −0.26 |
| Physical component score | −0.29 |
| Mental component score | −0.28 |
