Methods: 438 PD patients hospitalized for a 4-weeks Multidisciplinary Intensive Rehabilitation Treatment (MIRT) were enrolled. According to Mini Mental State Examination (MMSE), patients were divided into: normal cognition (MMSE 27-30), mild cognitive impairment (MMSE 21-26), moderate or severe cognitive impairment (MMSE ≤ 20). According to Frontal Assessment Battery (FAB), subjects were divided into patients with normal (FAB ≥ 13.8) and pathological (FAB < 13.8) score. The outcomes measures were: Unified Parkinson's Disease Rating Scale (UPDRS), Berg Balance Scale (BBS), Timed Up and Go Test (TUG), Six Minutes Walking Test (6MWT), Parkinson's Disease Disability Scale (PDDS).