Covariate | Odds ratio (95% CI)* | p Value |
Time since inclusion (per year) | 0.95 (0.90 to 1.02) | 0.148 |
Gender (female vs. male) | 0.59 (0.38 to 0.91) | 0.017 |
Hallucinations (present vs. absent) | 1.80 (0.83 to 3.89) | 0.135 |
Duration of disease† | 1.02 (0.97 to 1.08) | 0.357 |
UPDRS motor score (per 10 points)† | 0.79 (0.63 to 0.98) | 0.030 |
MMSE score† | 1.04 (0.98 to 1.10) | 0.225 |
BDI score† | 1.02 (0.99 to 1.05) | 0.277 |
Levodopa equivalent dose†,‡ | 1.13 (1.03 to 1.24) | 0.009 |
*Odds ratios for higher vs. lower pRBD categories from the proportional-odds model.
†In 1993 (baseline), ‡odds ratio per 100 mg.
BDI, Beck Depression Inventory; MMSE, Mini-Mental State Examination; pRBD, probable REM sleep behaviour disorder; UPDRS, Unified Parkinson’s Disease Rating Scale.