Table 1.
Overview of the demographic and clinical characteristics of the impulse control disorder (ICD)+ and ICD− groups (mean ± SD).
| Measure | PD ICD+ | PD ICD− | Group difference |
|---|---|---|---|
| # subjects | 21 | 30 | |
| Age (years) | 60 ± 5 | 62 ± 8 | t(49) = −3.92, p = 0.69 |
| Gender | 7 F/14 M | 11 F/19 M | χ2(1) = 0.06, p = 0.80 |
| Handedness | 3 L/18 R | 4 L/26 R | χ2(1) = 0.01, p = 0.92 |
| Age of PD onset (years)a | 55.9 ± 6.2 | 58.1 ± 8.4 | t(47) = −0.99, p = 0.32 |
| Disease duration (months)a | 57.3 ± 30.7 | 44.2 ± 37.7 | t(47) = 1.31, p = 0.19 |
| LED (mg) | 561 ± 322 | 486 ± 332 | t(49) = 0.80, p = 0.42 |
| UPDRS motor | 25.95 ± 9.92 | 25.33 ± 9.49 | t(49) = 0.22, p = 0.82 |
| BIS total score | 61.90 ± 15.16 | 54.10 ± 8.85 | t(49) = 2.32, p = 0.025 |
| Attentional impulsiveness | 16.33 ± 5.25 | 14.00 ± 3.47 | t(49) = 1.91, p = 0.062 |
| Motor impulsiveness | 21.90 ± 4.93 | 19.10 ± 2.99 | t(49) = 2.53, p = 0.015 |
| Non-planning impulsiveness | 23.67 ± 6.39 | 21.00 ± 4.55 | t(49) = 1.74, p = 0.088 |
| MoCA | 27.95 ± 1.59 | 27.33 ± 1.54 | t(49) = 1.39, p = 0.17 |
| NART-R (FSIQ score) | 112.49 ± 7.58 | 112.25 ± 5.56 | t(49) = 0.13, p = 0.89 |
aData from two patients in the ICD− group were missing.
PD, Parkinson’s disease; BIS, Barratt Impulsiveness Scale; MoCA, Montreal Cognitive Assessment; NART-R, National Adult Reading Test-Revised; FSIQ, Full Scale IQ; LED, Levodopa Equivalent Dose; UPDRS, Unified Parkinson’s Disease Rating Scale.