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The sleep quality of patients.
| Groups | ||||
| Variable | P | PE1 | PE2 | P value |
| Usual sleep quality (very well/fine/ ordinary/poor) | 28/39/18/11 | 26/42/15/13 | 27/43/16/10 | .882 |
| The nature of dreams (good/ordinary/bad) | 15/10/9 | 5/5/3 | 10/9/7 | .331 |
| Sleep quality after waking up (very good/okay/fair/poor) | 61/23/12/0 | 30/33/27/6 | 52/30/14/0 | .001 |
