Table 1.
demographic information
| Variable | Cognitively Impaired | Cognitively Unimpaired | Overall | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n | M (SD) | range | n | M (SD) | range | n | M (SD) | range | |
| Age (years) | 58 | 67.43 (10.06) | 39–91 | 53 | 62.73** (8.61) | 47–81 | 111 | 65.19 (9.65) | 39–91 |
| Education (years) | 58 | 15.17 (2.15) | 8–18 | 51 | 15.98* (1.43) | 13–18 | 111 | 15.56 (1.88) | 8–18 |
| Disease duration (years) | 57 | 7.25 (4.89) | 0–22 | 53 | 5.72 (4.77) | 1–18 | 110 | 6.51 (4.87) | 0–22 |
| UPDRS-Part III | 55 | 13.20 (9.45) | 0–44 | 53 | 8.89** (6.48) | 0–28 | 108 | 11.22 (8.43) | 0–44 |
|
| |||||||||
| n | % | n | % | n | % | ||||
|
| |||||||||
| Gender (n male; %) | 46 | 79.3% | 34 | 64.2% | 80 | 72.1% | |||
| Ethnicity | |||||||||
| Caucasian | 47 | 81.0% | 51 | 96.2% | 98 | 88.3% | |||
| African-American | 4 | 6.9% | 0 | 0.0% | 4 | 3.6% | |||
| Latino | 5 | 8.6% | 2 | 3.8% | 7 | 6.3% | |||
| Asian | 1 | 1.7% | 0 | 0.0% | 1 | 0.9% | |||
| Unknown | 1 | 1.7% | 0 | 0.0% | 1 | 0.9% | |||
| Major Depression† (n yes; %) | 3 | 5.2% | 2 | 3.8% | 5 | 4.5% | |||
UPDRS = Unified Parkinson’s Disease Rating Scale Part III—Motor Examination;
*
p < .05,
**
p < .01;
†
whether participant qualifies for a Major Depressive Disorder diagnosis according to the M.I.N.I. International Neuropsychiatric Interview depression module