Demographic characteristics and global assessment of the HD patients.

HD1: patients at Stage 1, HD2: patients at Stage 2; TFC: Total Functional Capacity; UHDRS: United Huntington Disease Rating Scale; MDRS: Mattis Dementia Rating Scale; FCSRT: Free and Cued Selective Reminding Test; RAVLT: Rey Auditory Verbal Learning Task; TMT-A; Trail Making Test form A; TMT-B: Trail Making Test form B; Stroop C/W: Stroop Color Interference Test; MCST: Modified Card Sorting Test; MADRS: Montgomery and Åsberg Depression Rating Scale; ns: non significant. a: 17/25; b: 18/21; c: 19/25; d: 14/21; e: 15/25; f: 15/21; g: 24/25; h: 20/21. *cut-off are provided according to [21].