Another study reported an initial significant association between global Aβ-PET and slow gait in individuals without dementia (n = 183), which became non-significant when adjusting for APOE4. The discrepancy between our study and their initial analyses might reflect that their sample was older (mean age 85.5 versus 72.4 years) and walked slower (0.88 m/s versus 1.1. The gene discussed is APOE; the disease is dementia.