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bvFTD shows severe functional impairment at baseline and over time.PNFA, SD, LPA, AD: less severe baseline functional impairment; more uniform decline.General cognition is related to IADLs, but not BADLs, in all groups.Behavioural disturbances relate to IADLs and BADLs in bvFTD and SD.Behavioural-ADL relations are more mixed in PNFA, LPA, and AD.
Foxe et al. (Tue,) studied this question.