Effect of age on response to rivastigmine or donepezil in patients with Alzheimer's disease

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Abstract
Background: Younger Alzheimer's disease (AD) patients appear to differ genetically and neuropathologically from older AD patients, and may experience a more aggressive disease course compared with older patients. A randomised trial investigated the efficacy and tolerability of rivastigmine, an inhibitor of acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE), and donepezil, an AChE-selective inhibitor, in patients with AD over a 2-year period. This retrospective analysis investigated whether younger and older patients showed differential tolerability and efficacy responses to cholinesterase inhibitor treatment.Methods: For the current analysis, patients were divided according to age at baseline: those aged < 75 years and those aged ≥ 75 years. Efficacy measures were the Severe Impairment Battery (SIB), Neuropsychiatric Inventory (NPI), Global Deterioration Scale (GDS), Mini-Mental State Examination (MMSE) and the AD Cooperative Study Activities of Daily Living scale (ADCS‐ADL). Changes in...