Confirmatory Factor Analysis of the Motor Unified Parkinson’s Disease Rating Scale

Table 1

Clinical and sociodemographic characteristics (𝑛=193).

	N (%) unless specified
Age in years: mean (SD)	72.4 (9.2)
Female	79 (41)
Ethnicity
White or European American	152 (79)
Latino or Hispanic	30 (16)
Other*	11 (6)
Highest level of education
Did not finish grade school (grades 1–8)	10 (5)
Finished grade school but no high school diploma	17 (9)
High school diploma	73 (38)
Technical or trade school diploma	21 (11)
College diploma	34 (18)
Graduate school diploma	28 (15)
Cannot remember/Refused/Do not know/Other	10 (5)
Marital status (𝑛=190)
Never married	6 (3)
Married	145 (76)
Divorced/Separated	15 (8)
Widowed	24 (13)
Work status
Employed	35 (18)
Retired	143 (74)
Other: unemployed (5), disabled (8), emeritus (1), housewife (1), temp work (1)	15 (8)
Mean duration of PD diagnosis, years (SD)	5.2 (2.3)
Modified Hoehn and Yahr Stage (OFF state)
Stage 1: Unilateral disease	10 (5)
Stage 1.5: Unilateral plus axial involvement	9 (5)
Stage 2: Bilateral disease, without impairment of balance	64 (34)
Stage 2.5: Mild bilateral disease with recovery on pull test	54 (28)
Stage 3: Mild to moderate bilateral disease; some postural instability; physically independent	34 (18)
Stage 4: Severe disability; still able to walk or stand unassisted	12 (6)
Stage 5: Wheelchair bound or bedridden unless aided	7 (4)
Medication status**
Levodopa only	67 (35)
Levodopa and any other medication	108 (56)
Dopamine agonists without Levodopa	17 (9)
How Parkinson’s disease affects you on a day-to-day basis?***
No difficulties	27 (16)
Mild difficulties	94 (55)
Moderate difficulties	39 (23)
High levels or extreme difficulties	10 (6)
During the past 6 months, how would you rate the severity of your Parkinson’s disease symptoms? ***
No symptoms	4 (2)
Mild symptoms	79 (47)
Moderate symptoms	79 (47)
Severe symptoms	8 (5)

*Other race includes African America, Native American, or Asian or Pacific Islander.
**One subject excluded because they were on MAO-B inhibitors alone.
***Subjects with self-rated reports within 30 days of motor UPDRS exam (𝑛=170).