RBD (n = 21) | No RBD (n = 15) | Regression RBD main effect (SE) | p Value | |
Tremor (% of UPDRS III) | 8.2 (9.2) | 19.0 (15.2) | −0.11 (0.04) | 0.01 |
Initial symptom = tremor (yes:no) | 5:16 (24%) | 9:6 (60%) | −1.93 (0.91) | 0.034 |
Scheiss classification20 (akinetic rigid:tremor+mixed) | 18:3 (86%) | 7:8 (47%) | 2.37 (0.99) | 0.017 |
Rigidity (% of UPDRS III) | 21.4 (8.6) | 18.1 (9.8) | 0.025 (0.03) | 0.42 |
Bradykinesia (% of UPDRS III) | 46.5 (11.0) | 44.0 (19.3) | 0.03 (0.053) | 0.56 |
Gait (% of UPDRS III) | 11.5 (6.8) | 9.7 (5.9) | 0.02 (0.02) | 0.40 |
Freezing (yes:no) | 8/13 (38%) | 2/13 (13%) | 1.91 (1.13) | 0.091 |
Falls (yes:no) | 8/13 (38%) | 1/14 (7%) | 2.62 (1.29) | 0.044 |
Bulbar (% of UPDRS III) | 12.4 (5.7) | 9.2 (4.7) | 0.033 (0.019) | 0.093 |
Choking (yes:no) | 6/15 (29%) | 3/12 (20%) | 0.88 (0.91) | 0.331 |
Drooling (yes:no) | 11/10 (52%) | 10/5 (67%) | −0.54 (0.73) | 0.465 |
Axial:limb ratio | 0.43 (0.178) | 0.33 (0.18) | 0.1 (0.06) | 0.11 |
Data for continuous variables are presented as mean (SD).
RBD, REM sleep behaviour disorder; UPDRS, Unified Parkinson Disease Rating Scale.