| T1 (first night) | With pain medication N = 25 | Without pain medication N = 23 | p-value |
VSH | Total quality of sleep, average, SD | 73.6 ± 18.9 | 70.3 ± 21.3 | 0.57 |
| Disturbance of sleep, average, SD | 35.4 ± 15.2 | 38.0 ± 16.1 | 0.57 |
| Efficacy of sleep, average, SD | 16.1 ± 7.6 | 18.1 ± 8.0 | 0.39 |
| Need for extra sleep, average, SD | 17.0 ± 7.1 | 19.8 ± 7.1 | 0.19 |
ESS | Average, SD | 4.6 ± 2.7 | 4.7 ± 4.3 |
|