The estimated (SE) rates of decline in total MoCA score were −0.29 (0.05) points/y for idiopathic PD, −0.52 (0.09) points/y for GBA PD, −0.19 (0.06) points/y for LRRK2 PD, and −0.21 (0.06) points/y for LRRK2/GBA PD (Figure 1). The gene discussed is LRRK2; the disease is Parkinson disease.