Females were underrepresented in the DLB (vs. FTD, p = 0.002; vs. CBS, p = 0.004, vs. AD, p = 0.002, vs. SNAP p = 0.04) and PSP (vs. FTD, p = 0.046; vs. CBS, p = 0.039) groups. This evidence concerns the gene CBS and frontotemporal dementia.