Table 3.
Symmetry of UPDRS motor scores in the measurements with parkinsonism in the upper and/or lower limb(s)a (patients N = 190, number of measurements N = 404).
| UPDRS motor symmetry, items 20–26 | Mean (SD) | Range | Number of measurements |
|---|---|---|---|
| Score per UPDRS item | 0.64 (0.55) | 0–4 | 404 |
| Absolute difference per itemb | 0.10 (0.16) | 0–1 | 404 |
| SIc | 0.13 (0.24) | 0–1 | 404 |
| SI tremor | 0.06 (0.22) | 0–1 | 404 |
| SI bradykinesia | 0.16 (0.29) | 0–1 | 404 |
| SI rigidity | 0.07 (0.23) | 0–1 | 400 |
| Asymmetry (SI ≥ 0.20) | 84 (20.8%) | 404 |
SI, symmetry index; UPDRS, Unified Parkinson Disease Rating Scale.
aThe total of the items 20–26 of the UPDRS motor score is >0.
bThe mean absolute difference between the left and right UPDRS motor items 20–26.
cHigher values of the symmetry index indicate a higher degree of asymmetry. Symmetry index of the UPDRS motor items 20–26 = (mean absolute difference UPDRS left and right)/(sum of the mean UPDRS left and right).