Effects of <i>GBA1</i> Variants in Patients With Parkinson's Disease and Levodopa–Carbidopa Intestinal Gel: A Nation‐Wide, Multicenter, Longitudinal, “Real‐World” Study. The <scp>EPIC</scp> Study

GBA1 status does not increase the risk of adverse events or LCIG discontinuation. LCIG is a safe option for advanced GBA-PD, even in patients with cognitive impairment at baseline. However, GBA-PD experiences lower efficacy on motor disability and complications and faster cognitive decline than noncarriers.