Standardised regression coefficient | SE | p Value | |
HY stage | 0.143 | 0.556 | 0.0011 |
Number of sleep-related symptoms | 0.226 | 0.293 | <0.0001 |
Disease duration | 0.193 | 0.073 | <0.0001 |
MDS-UPDRS part III | 0.264 | 0.028 | <0.0001 |
TD/PIGD ratio | −0.208 | 0.162 | <0.0001 |
Depression | 0.117 | 0.920 | 0.0012 |
MDS-UPDRS part IV | 0.109 | 0.108 | 0.0085 |
Final model, adjusted R2=0.539.
Dependent variables; age, sex, HY stage, disease duration, MMSE, MDS-UPDRS III, IV, number of sleep-related symptoms (0–3; EDS, PD-SP and pRBD), depression and TD/PIGD ratio.
HY, Hoehn and Yahr stage; MDS-UPDRS, Movement Disorder Society revision of the Unified Parkinson’s Disease Rating Scale; TD, tremor dominant; PIGD, postural instability and gait disturbance.