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Percentage of patients with clinically impaired performance on neuropsychological tests. ***p < .001; **p < .01; *p < .05. MMSE = Mini-Mental State Examination; PD-RBD = Parkinson’s disease with REM sleep behavior disorder; PD-nRBD = PD without RBD; RAVLT = Rey Auditory-Verbal Learning Test; ROCF = Rey-O Complex Figure; Stroop components: II = Naming, III = Interference, IV = Flexibility.
