Figure 2. Cumulative incidence curves for median cutoff categories for Parkinson disease (PD)–mild cognitive impairment (MCI) and neuropsychological tests.

PD-MCI: yes black, no red; Mini-Mental State Examination (MMSE): < median black, > median red; long-term memory score on the Auditory Verbal Learning Test (AVLT-LTM): < median black, > median red; Controlled Oral Word Association Test (COWAT): < median black, > median red; Stroop-interference: < median black, > median red; Trails B: > median black, < median red; Wechsler Adult Intelligence Scale (WAIS)–III Digit Span: < median black, > median red; Judgment of Line Orientation (JLO): < median black, > median red. Asterisks indicate statistical significance as defined by p < 0.05.