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  2. Informal Care Time and Cost in a Large Clinical Trial Sample of Patients with Mild to Moderate Alzheimer’s Disease: Determinants and Level of Change Observed

Informal Care Time and Cost in a Large Clinical Trial Sample of Patients with Mild to Moderate Alzheimer’s Disease: Determinants and Level of Change Observed

Introduction: We evaluate the association between caregiver (informal) time/cost and illness severity from two recently completed clinical trials of an investigational drug for Alzheimer’s disease (AD). Methods: Changes from baseline caregiver time were calculated and treatment effects analyzed using a restricted maximum likelihood-based mixed model for repeated measures. Four separate models were then estimated to examine the association between caregiver time costs and the clinical endpoints measured during the trials, including cognition (MMSE), function (DAD), behavior (NPI), global disability (CDR) and dependence (DS). Results: Caregiver time cost was significantly associated with all clinical measures of illness severity with a 1-unit change in MMSE, DAD, NPI, CDR and DS associated with a 11.57%, 4.81–4.97%, 3.58–3.67%, 42.52% and 71.05% change, respectively, in primary caregiver time cost. The association between caregiver time cost and DS was the strongest of all the associations examined. Conclusion: Caregiver time costs increase with increasing AD severity in all key domains of AD (cognition, function, behavior, global disability and dependence on others). Our analysis demonstrated that patient dependence is a particularly important predictor of caregiver time costs and should be considered as a potential outcome measure in intervention clinical trials in AD. Funding: Pfizer Inc. and Janssen Alzheimer Immunotherapy Research and Development.

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Key Information

Type of Reference
Jour
Type of Work
Randomized controlled trial, clinical trial
Publisher
Springer Nature
ISBN/ISSN
2193-8253
Publication Year
2017
Issue Number
1
Journal Titles
Neurology and Therapy
Volume Number
6
Start Page
11
End Page
23