Late‐life behavioral disorder: when is it FTD?

Distinguishing the behavioural variant of Frontotemporal Dementia (bvFTD) from late‐onset primary psychiatric diseases (PPD) remains challenging with the lack of robust biomarkers for either disorder. Optimal duration of follow‐up of potential FTD cases remains elusive. Our aim was to determine whether a follow up duration of 5 years has added value compared to 2 years in the late‐onset frontal lobe syndrome. Second, we defined which clinical characteristics are valuable for diagnostic precision.