Table 2.
Means and standard deviations of health status, motor, cognitive, and mood test scores
| Raw score (mean [SD]) | Standard score (t-score or scaled score) (mean [SD]) | |
|---|---|---|
| PDQ-39 Summary Index | 17.5 (8.9) | – |
| UPDRS Part III Total Score | 17.4 (8.5) | – |
| Gait–balance | 4.8 (2.6) | – |
| Tremor | 1.5 (1.2) | – |
| Rigidity | 3.5 (2.7) | – |
| Bradykinesia | 7.7 (5.1) | – |
| GDS total score | 4.5 (3.6) | – |
| MDRS total score | 139.0 (3.4) | 52.4 (4.9) |
| MDRS attention | 36.2 (1.2) | 54.3 (7.7) |
| MDRS initiation/perseveration | 36.2 (1.1) | 52.4 (3.7) |
| MDRS construction | 5.7 (.54) | 48.1 (8.9) |
| MDRS conceptualization | 37.4 (1.9) | 50.7 (7.4) |
| MDRS memory | 23.7 (1.6) | 52.0 (7.7) |
| CVLT-II Trials 1–5 | 47.3 (12.9) | 55.8 (12.5) |
| WCST perseverative errors | 16.7 (15.2) | 51.2 (12.1) |
| WCST categories correct | 4.7 (2.1) | 53.6 (11.7) |
| DKEFS letter fluency number correct | 44.1 (14.8) | 12.4 (4.3)a |
| DKEFS category fluency number correct | 36.8 (10.1) | 10.7 (3.6)a |
| JLO total score | 25.2 (4.5) | 12.8 (3.0)a |
Notes: SD = standard deviation; PDQ-39 = Parkinson's disease questionnaire-39; UPDRS = Unified Parkinson's Disease Rating Scale; GDS = Geriatric Depression Scale; MDRS = Mattis Dementia Rating Scale; CVLT-II = California Verbal Learning Test-II; WCST = Wisconsin Card Sorting Test; DKEFS = Delis Kaplan Executive Function System; JLO = Judgment of Line Orientation Test. Gait–balance, Tremor, Rigidity, and Bradykinesia (left and right-sided combined) are UPDRS Part III factors as described in Stebbins and colleagues (1999). Normative scores for the MDRS and the MDRS subscales (attention, initiation/perseveration, construction, concentration, and memory) were derived from Montgomery and Costa (1983); normative scores for the CVLT-II were derived from Delis and colleagues (2000); normative scores for the WCST categories correct were derived from Rhodes (2004); normative scores for the WCST perseverative errors were derived from Heaton and colleagues (1993); DKEFS letter and category fluency normative scores were derived from Delis and colleagues (2001), and the normative scores for the JLO were derived from Ivnik and colleagues (1996).
aScaled scores. All other standard scores are t-scores.