| Parameter | Conventional therapy (n = 20) | Levodopa/carbidopa intestinal gel continuous administration (n = 20) | p-value |
| Anosmia | 11 (55%) | 12 (60%) | 0.343 |
| Constipation | 13 (65%) | 14 (70%) | 0.027 |
| Orthostatic hypotension | 12 (60%) | 9 (45%) | 0.752 |
| Restless legs syndrome | 12 (60%) | 10 (50%) | 0.527 |
| Sleeping disorders | 11 (55%) | 16 (80%) | 0.027 |
| Hypersalivation | 11 (55%) | 7 (35%) | 0.527 |
| Mental disorders | 12 (60%) | 16 (80%) | 0.011 |
| Urinary incontinence | 7 (35%) | 14 (70%) | 0.752 |