Confirmatory Factor Analysis of the Motor Unified Parkinson’s Disease Rating Scale
Table 3
Descriptive statistics for UPDRS motor score and subscales ()*.
Mean (SD)
Cronbach’s alpha
Minimum observed value
Maximum observed value
Percent scoring possible minimum (best)/maximum (worst)*
Total Motor UPDRS Motor (27 items; range 0 to 108)
OFF
25.0 (11.7)
0.89
5
66
0.0/0.0
ON
17.2 (10.8)
0.89
1
64
0.0/0.0
Gait/Posture (7 items; range 0 to 100)
OFF
30.6 (17.2)
0.91
0
82
2.1/0.0
ON
23.5 (17.3)
0.91
0
82
3.6/0.0
Tremor (5 items; range 0 to 100)
OFF
14.9 (12.6)
0.92
0
60
14.5/0.0
ON
8.8 (9.9)
0.92
0
55
33.7/0.0
Rigidity (3 items; range 0 to 100)
OFF
14.8 (14.8)
0.91
0
58
27.9/0.0
ON
7.6 (11.5)
0.91
0
58
53.4/0.0
Right (5 items; range 0 to 100)
OFF
27.7 (15.6)
0.91
0
80
3.6/0.0
ON
18.6 (14.4)
0.91
0
60
14.5/0.0
Left (5 items; range 0 to 100)
OFF
29.0 (19.4)
0.91
0
80
9.4/0.0
ON
20.6 (16.9)
0.90
0
75
17.1/0.0
*All scales and subscales are scored so that higher values indicate more severely affected. Possible range for total motor UPDRS score is 0 (best) to 108 (worst). Possible range for subscales is 0 (best) to100 (worst).
