Impact of cholinesterase inhibitors or memantine on survival in adults with Down syndrome and dementia: clinical cohort study
2018
Background: There is little evidence to guide pharmacological treatment in adults with Down syndrome and Alzheimer's disease. / Aims: To investigate the effect of cholinesterase inhibitors or memantine on survival and function in adults with Down syndrome and Alzheimer's disease. / Method: This was a naturalistic longitudinal follow-up of a clinical cohort of 310 people with Down syndrome diagnosed with Alzheimer's disease collected from specialist community services in England. / Results: Median survival time (5.59 years, 95% CI 4.67–6.67) for those on medication (n = 145, mainly cholinesterase inhibitors) was significantly greater than for those not prescribed medication (n = 165) (3.45 years, 95% CI 2.91–4.13, log-rank test P<0.001). Sequential assessments demonstrated an early effect in maintaining cognitive function. / Conclusions: Cholinesterase inhibitors appear to offer benefit for people with Down syndrome and Alzheimer's disease that is comparable with sporadic Alzheimer's disease; a trial to test the effect of earlier treatment (prodromal Alzheimer's disease) in Down syndrome may be indicated. / Declaration of interest: A.S. has undertaken consulting for Ono Pharmaceuticals, outside the submitted work. Z.W. has received a consultancy fee and grant from GE Healthcare, outside the submitted work.
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