GBA1 and Parkinson disease: The complete cognitive evaluation, assessed in a subset of 92 patients (11 GBA1, 5 PRKN, 4 LRRK2, 47 negative controls, 25 VUS) showed pathological performance (at least -1.5 z score below appropriate norms) in GBA1 patients in visuospatial and executive domains (in 64% and 55% respectively), and an overall tendency to lower mean z scores in each cognitive domain compared to negative controls and other monogenic PD forms.