There was no significant difference in the prevalence of hallucinations, ICD and psychiatric disturbances (p 0.07) although these were a frequent trend in GBA1-PD compared to the negative control group and idiopathic late onset PD; accordingly, GBA1-PD patients necessitated more of advanced therapy approaches (14/28 GBA1-PD patients underwent DBS and 4 were treated with LCIG). Here, GBA1 is linked to Parkinson disease.