Table 1.
Mean (SD) demographic characteristics and neuropsychological assessment of the Parkinson's (PD) and age-matched controls groups.
| PD patients | Controls | t | p | |
|---|---|---|---|---|
| Gender | 19 M, 8 F | 12 M, 16 F | ||
| Age | 63.38 (6.59) | 64.34 (5.65) | .581 | .56 |
| Education | 14.59 (3.53) | 16.17 (3.13) | 1.785 | .08 |
| Geriatric Depression Scale | 3.34 (2.66) | 1.03 (1.22) | 4.3 | <.001* |
| Digit span forwards | 6.97 (1.02) | 6.86 (.98) | .386 | .701 |
| Digit span backwards | 4.79 (1.44) | 4.97 (1.01) | .513 | .61 |
| Mill Hill vocabulary | 22.14 (4.3) | 25.1 (3.57) | 2.936 | .005* |
| Verbal IQ (NART) | 115.07 (7.93) | 119.81 (5.29) | 2.535 | .014* |
| Stroop interference | .19 (11.12) | −1.06 (9.16) | .096 | .924 |
| Phonetic fluency | 17.33 (6.99) | 18.08 (3.89) | .474 | .638 |
| Semantic fluency | 25.62 (5.99) | 27.9 (4.51) | 1.555 | .126 |
* Indicates significant group differences.