Table 2.
Selected Feature | UPDRS Part III Single Items | Total UPDRS Part III Score | ||||||
---|---|---|---|---|---|---|---|---|
Finger Tapping (RH) | Finger Tapping (LH) | Rigidity UE (RH) | Rigidity UE (LH) | Action Tremor (RH) | Action Tremor (LH) | BK/HK | ||
HT | 0.60† | 0.33† | 0.69† | 0.30† | 0.39† | 0.05n.s. | 0.50† | 0.53† |
HT | 0.64† | 0.49† | 0.71† | 0.47† | 0.42† | 0.16n.s. | 0.63† | 0.62† |
NFT | −0.48† | −0.46† | −0.51† | −0.45† | −0.35† | −0.11n.s | −0.58† | −0.51† |
NP | −0.60† | −0.56† | −0.55† | −0.52† | −0.40† | −0.31† | −0.62† | −0.62† |
Values of Spearman’s correlation coefficient rs are presented after correlating the most frequently selected features (HT , HT , NFT , NP ) (see also Table 1) with UPDRS Part III single-item scores of relevant PD motor symptoms, i.e., rigidity of upper extremities, action tremor, and bradykinesia (finger tapping and body bradykinesia-hypokinesia), as well as with the total UPDRS Part III score, across all subjects (both early PD patients and controls). All healthy controls were assigned a value of zero for each UPDRS Part III item. As the latter renders each UPDRS item variable skewed, Spearman’s rank correlation was employed for this analysis. BK/HK: Bradykinesia/Hypokinesia; RH: Right Hand; LH: Left Hand; UE: Upper Extremity; †p < 0.001; n.s.: p > 0.05.