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Table 1 Summary statistics of the UPDRS motor items

From: Motor function in Parkinson's disease and supranuclear palsy: simultaneous factor analysis of a clinical scale in several populations

    PD-On PD-Off PSP
  UPDRS Motor Items   M SD Skew Kurt. M SD Skew Kurt. M SD Skew Kurt.
1 Speech   1.40 0.91 0.37 -.06 1.72 0.93 0.33 .03 2.45 1.00 0.07 -.92
2 Facial Expression   1.55 0.89 0.44 .11 2.15 0.85 0.06 -.25 2.67 1.02 -0.33 -.58
3 Tremor-at-rest: H/N 0.48 0.73 1.42 1.45 0.36 0.76 2.24 4.71 0.02 0.24 11.69 142.73
4   RUE 0.81 0.93 0.75 -.52 1.01 1.19 0.80 -.58 0.10 0.42 4.56 22.08
5   RLE 0.55 0.76 1.15 .35 0.65 1.01 1.28 .44 0.03 0.21 6.86 51.53
6   LUE 0.69 0.87 0.91 -.38 0.94 1.19 1.08 .10 0.10 0.41 4.72 23.60
7   LLE 0.52 0.73 1.24 .74 0.65 1.10 1.60 1.52 0.03 0.25 10.47 118.78
8 Postural tremor R 0.66 0.68 0.87 1.33 0.93 0.87 0.69 .02 0.34 0.55 1.40 1.02
9   L 0.64 0.63 0.46 -.66 0.98 0.95 0.69 -.28 0.34 0.57 1.65 2.69
10 Rigidity H/N 1.24 0.80 0.19 .00 1.89 1.07 0.03 -.55 2.40 1.19 -0.22 -.91
11   RUE 1.68 0.78 -0.24 .16 1.84 0.90 -0.21 .07 1.70 0.98 0.30 .11
12   RLE 1.36 0.80 0.29 .29 1.58 1.06 0.01 -.74 1.34 1.01 0.35 -.69
13   LUE 1.63 0.78 0.26 .54 1.96 0.91 -0.25 -.01 1.61 1.03 0.23 -.24
14   LLE 1.39 0.82 0.44 .60 1.68 1.11 0.07 -.76 1.37 1.04 0.26 -.83
15 Finger taps R 1.58 0.78 0.34 .55 2.20 0.93 0.17 -.46 1.54 1.04 0.42 -.37
16   L 1.59 0.82 0.69 1.05 2.38 1.01 -0.28 -.32 1.69 1.12 0.40 -.59
17 Hand movements R 1.50 0.83 0.58 .57 1.72 0.94 0.48 -.04 1.59 0.98 0.61 -.04
18   L 1.51 0.84 0.79 1.06 1.98 1.00 0.08 -.49 1.65 1.02 0.55 -.22
19 Rapid Alternating. Movements. R 1.45 0.82 0.35 .35 1.85 0.97 0.20 -.29 1.66 1.06 0.43 -.31
20   L 1.50 0.80 0.71 1.14 2.21 1.04 -0.16 -.47 1.76 1.15 0.53 -.50
21 Leg agility R 1.44 0.83 0.73 .91 2.05 1.03 0.02 -.64 1.57 1.13 0.42 -.47
22   L 1.50 0.85 0.81 1.03 2.25 1.03 -0.17 -.55 1.72 1.18 0.37 -.59
23 Arise from chair   1.23 1.05 1.07 .88 1.70 1.45 0.33 -1.28 2.40 1.24 -0.11 -1.20
24 Posture   1.35 0.86 0.67 .66 1.75 1.10 0.26 -.56 1.47 1.14 0.31 -.61
25 Gait   1.28 0.91 0.66 .29 2.12 1.13 0.02 -.71 2.60 1.14 -0.42 -.63
26 Postural stability   0.89 1.01 1.17 .96 1.95 1.23 0.09 -.97 2.67 1.12 -0.28 -.92
27 Body bradykinesia   1.45 0.97 0.73 .14 2.46 1.05 -0.15 -.69 2.39 0.98 -0.26 -.92
  Motor Total   32.9 14.8 0.38   44.9 15.0 0.75   39.2 13.9 0.64  
  1. Skew = Skewness; Kurt. = Kurtosis;
  2. Striking values are in italics. Standard error skewness approx. 0.15; kurtosis approx 0.32 The items are numbered according to the standard way they appear in the Motor Scale of the UPDRS. R = Right-hand side; L = left-hand side; UE = Upper Extremity; LE = Lower Extremity; H/N = Head and Neck
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