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Androgen deprivation therapy for prostate cancer and risk of dementia

Journal article
Authors D. Robinson
H. Garmo
M. Van Hemelrijck
Jan-Erik Damber
Ola Bratt
L. Holmberg
L. O. Wahlund
P. Stattin
J. Adolfsson
Published in Bju International
Volume 124
Issue 1
Pages 87-92
ISSN 1464-4096
Publication year 2019
Published at Institute of Clinical Sciences, Department of Urology
Pages 87-92
Language en
Links dx.doi.org/10.1111/bju.14666
Keywords androgen deprivation therapy, dementia, #ProstateCancer, #PCSM, #ADT, #Dementia, free testosterone, alzheimers-disease, cognitive function, cohort, profile, men, association, register, sweden, Urology & Nephrology, arlson me, 1987, journal of chronic diseases, v40, p373
Subject categories Urology and Nephrology, Cancer and Oncology

Abstract

Objectives To study whether androgen deprivation therapy (ADT), the mainstay treatment for advanced and disseminated prostate cancer, is associated with risk of dementia. Methods Risk of dementia in men with prostate cancer primarily managed with ADT or watchful waiting (WW) in the Prostate Cancer Database Sweden, PCBaSe, was compared with that in prostate cancer-free men, matched on birth year and county of residency. We used Cox regression to calculate the hazard ratios (HRs) for Alzheimer's and non-Alzheimer's dementia (vascular dementia, dementia secondary to other diseases or unspecified dementias) for different types and duration of ADT and oral antiandrogens (AAs) as well as for men managed with WW. Results A total of 25 967 men with prostate cancer and 121 018 prostate cancer-free men were followed for a median of 4 years. In both groups 6% of the men were diagnosed with dementia. In men with prostate cancer, gonadotropin-releasing hormone agonist treatment ( HR 1.15, 95% confidence interval [CI] 1.07-1.23) and orchiectomy (HR 1.60, 95% CI 1.32-1.93) were associated with an increased risk of dementia, as compared to no treatment in prostate cancer-free men; however, this increase in risk was only observed for non-Alzheimer's dementia and occurred from year 1-4 after start of ADT. No increase in risk for any type of dementia was observed for men treated with AAs or for men on WW. Conclusion This population-based cohort study does not support previous observations of an increased risk of Alzheimer's dementia for men on ADT; however, there was a small increase in risk of non-Alzheimer's dementia.

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