Table 3.
The correlation analysis between the sleep scales and serum melatonin levels in PD patients and controls.
| PD (n=40) | Controls (n=40) | |||||||
|---|---|---|---|---|---|---|---|---|
| Melatonin at 00:00 am | Melatonin at 05:00 am | Melatonin at 00:00 am | Melatonin at 05:00 am | |||||
| r | p | r | p | r | p | r | p | |
| PSQI | -0.087 | 0.592 | -0.099 | 0.544 | -0.026 | 0.873 | -0.157 | 0.355 |
| ESS | -0.127 | 0.435 | -0.353 | 0.025 | -0.056 | 0.730 | -0.076 | 0.641 |
PD, Parkinson’s disease; PSQI, Pittsburg Sleep Quality Index; ESS, Epworth Sleepiness Scale. r, rho-correlation coefficient; p, significance value. bold indicates significance value <0.05.