It is unknown whether cognitive status or diagnosed cognitive decline affects estrogen use.
We assessed how common systemic estrogen use was among community-dwellers with Alzheimer's disease (AD) and a matched comparison cohort without AD.
This study included an exposure-matched cohort of all Finnish community-dwelling women who received a clinically verified diagnosis of AD in 2005-2011 (N?=?46,116; index cases) and an equally sized matched comparison cohort without AD. Follow-up began on the matching date (date of the AD diagnosis of the index case). Data on systemic estrogen use were obtained from the prescription register. Use initiation and discontinuation were assessed.
Altogether 3.1% of women with AD and 4.3% of women without AD used estrogen during the follow-up period. Only?