Table 2 |
||
| Correlations between the Epworth sleepiness scale (ESS) scores and clinical and sleep characteristics of multiple system atrophy (MSA) patients | ||
| Variables | r value | P value |
| Disease duration (months) | −0.063 | 0.766 |
| UMSARS | 0.210 | 0.337 |
| MMSE | −0.047 | 0.825 |
| FAB | −0.098 | 0.657 |
| Total sleep time (min) | 0.262 | 0.215 |
| Sleep efficiency (%) | 0.297 | 0.149 |
| Stage N1 (%) | 0.138 | 0.512 |
| Stage N2 (%) | 0.179 | 0.391 |
| Stage N3 (%) | −0.267 | 0.197 |
| Stage REM (%) | −0.311 | 0.131 |
| Arousal index (/h) | −0.070 | 0.738 |
| AI (/h) | 0.069 | 0.744 |
| AHI (/h) | 0.098 | 0.640 |
| Mean SpO2 (%) | 0.080 | 0.705 |
| PLM index (/h) | −0.218 | 0.296 |
| PLM arousal index (/h) | 0.066 | 0.755 |
| LED (mg) | 0.662 | 0.027 |
UMSARS, unified multiple system atrophy rating scale; MMSE, mini-mental state examination; FAB, frontal assessment battery; REM, rapid eye movement; AI, apnea index; AHI, apnea-hypopnea index; SpO2, oxygen saturation; PLM, periodic leg movement; LED, L-dopa-equivalent dose.
Shimohata et al. BMC Neurology 2012 12:130 doi:10.1186/1471-2377-12-130
