Table I.
Sociodemographic and clinical features of the study sample.
| Total sample n=121 | Subgroup with a DRS score ≥ 126 n=68 | Subgroup with a DRS score < 126 n=53 | |
|---|---|---|---|
| Age | 69.7±7.8 (50–86) | 66.7±7.5* (50–86) | 73.6±6.2 (52–85) |
| Education | 7.9±4.0 (3–17) | 9.4±4.0* (5–17) | 6.0±3.1 (3–17) |
| Sex (% of men) | 55.4 | 51.5 | 60.4 |
| Disease duration | 5.9±4.3 (0.2–21.0) | 5.4±3.7 (0.2–15) | 6.4±4.9 (1.0–21.0) |
| UPDRS motor score | 21.2±11.3 (4–54) | 16.7±8.2* (4–39) | 26.3±12.1 (4–54) |
| H&Y stage < 2.5) | 62.8 | 71.9* | 51.0 |
| MMP score | 25.6±5.1 (7–32) | 28.3±2.8* (17–32) | 22.1±5.3 (7–32) |
| DRS score | 124.2±13.0 (76–144) | 133.6±5.3* (126–144) | 112.2±9.5 (76–125) |
| GDS – short form score | 3.3±2.4 (0–9) | 3.1±2.2 (0–8) | 3.5±2.7 (0–9) |
Values are expressed as mean ± standard deviation (range)
*
p<0.0001 vs the subgroup with a DRS score < 126.
Abbreviations: DRS=Dementia Rating Scale; PD=Parkinson’s disease; UPDRS=Unified Parkinson’s Disease Rating Scale; H&Y= Hoehn and Yahr; MMP=Mini-Mental Parkinson test, GDS=Geriatric Depression Scale