Disease indices, sociodemographic variables, and neuropsychological test results in 121 patients with Parkinson's disease and 126 controls
| Patients | Controls | |
| Men | 70 (58) | 68 (54) |
| Mean age (y) | 44.9 (SD 4.0) | 43.8 (SD 4.6) |
| Mean age of PD onset (y) | 36.4 (SD 7.2) | |
| Mean disease duration (y) | 8.1 (SD 6.4) | |
| Hoehn and Yahr stage | ||
| I | 27 (22) | |
| II | 36 (30) | |
| III | 47 (39) | |
| IV | 11 (9) | |
| Mean UPDRS-III score | 25 (SD 14) | |
| Mean daily levodopa dosage (mg) | 394 (SD 232) | |
| No of patients treated with: | ||
| Dopamine agonists | 108 (89) | |
| MAOB inhibitors | 24 (20) | |
| Anticholinergics | 27 (22) | |
| COMT inhibitors | 34 (28) | |
| Antidepressants | 23 (19) | |
| Unmarried | 15 (12) | 8 (6) |
| At least one child | 99 (82) | 99 (79) |
| School years | ||
| 8 | 46 (38) | 51 (41) |
| 10 | 35 (29) | 50 (40) |
| 13 | 40 (33) | 25 (20) |
| Currently employed | 50 (41)1-150 | 102 (81) |
| Median IQ (WAIS) | 99 | 101 |
| Median depression score | ||
| Men | 62.61-150 | 52.9 |
| Women | 60.81-150 | 50.1 |
↵1-150 p<0.05. Values in parentheses are % unless stated otherwise.