Logistic regression analysis of sleep-related symptoms
| OR | 95% CI | p Value | |
| (1) EDS | |||
| Sex (male=1, female=2) | 0.520 | 0.342 to 0.791 | 0.0022 |
| MDS-UPDRS part III | 0.982 | 0.964 to 0.999 | 0.045 |
| Hallucination | 2.075 | 1.001 to 4.304 | 0.049 |
| MDS-UPDRS part II | 1.083 | 1.053 to 1.113 | <0.0001 |
| (2) pRBD | |||
| Sex (male=1, female=2) | 0.663 | 0.441 to 0.998 | 0.049 |
| Hallucination | 2.570 | 1.264 to 5.222 | 0.0091 |
| MDS-UPDRS part II | 1.041 | 1.017 to 1.066 | 0.00082 |
| (3) PD-SP | |||
| Disease duration | 1.050 | 1.003 to 1.099 | 0.035 |
| Depression | 2.917 | 1.553 to 5.480 | 0.00087 |
| MDS-UPDRS part II | 1.097 | 1.065 to 1.129 | <0.0001 |
Independent variables: EDS, RBD or PD-SP plus age, sex, disease duration, Hoehn and Yahr stage, MDS-UPDRS parts II, III and IV, fall, visual hallucination, depression, dopamine agonist use, levodopa use.
A multivariate logistic model using a likelihood ratio forward selection.
EDS, excessive daytime sleepiness; MDS-UPDRS, Movement Disorder Society revision of the Unified Parkinson's Disease Rating Scale; pRBD, probable RBD; PD-SP, PD-related sleep problems.