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Alzheimers Dement (Amst). 2016 Aug 03;4:76-84. doi: 10.1016/j.dadm.2016.07.002. eCollection 2016.

Assessing risk for preclinical β-amyloid pathology with .

Alzheimer's & dementia (Amsterdam, Netherlands)

Philip S Insel, Sebastian Palmqvist, R Scott Mackin, Rachel L Nosheny, Oskar Hansson, Michael W Weiner, Niklas Mattsson

Affiliations

  1. Clinical Memory Research Unit, Faculty of Medicine, Lund University, Lund, Sweden; Center for Imaging of Neurodegenerative Diseases, Department of Veterans Affairs Medical Center, San Francisco, CA, USA; Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, USA.
  2. Clinical Memory Research Unit, Faculty of Medicine, Lund University, Lund, Sweden; Memory Clinic, Skåne University Hospital, Malmö, Sweden; Department of Neurology, Skåne University Hospital, Lund, Sweden.
  3. Center for Imaging of Neurodegenerative Diseases, Department of Veterans Affairs Medical Center, San Francisco, CA, USA; Department of Psychiatry, University of California, San Francisco, CA, USA.
  4. Center for Imaging of Neurodegenerative Diseases, Department of Veterans Affairs Medical Center, San Francisco, CA, USA.
  5. Clinical Memory Research Unit, Faculty of Medicine, Lund University, Lund, Sweden; Memory Clinic, Skåne University Hospital, Malmö, Sweden.
  6. Center for Imaging of Neurodegenerative Diseases, Department of Veterans Affairs Medical Center, San Francisco, CA, USA; Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, USA.

PMID: 27722193 PMCID: PMC5045949 DOI: 10.1016/j.dadm.2016.07.002

Abstract

INTRODUCTION: Clinical trials in Alzheimer's disease are aimed at early stages of disease, including preclinical Alzheimer's disease. The high cost and time required to screen large numbers of participants for Aβ pathology impede the development of novel drugs. This study's objective was to evaluate the extent to which inexpensive and easily obtainable information can reduce the number of screen failures by increasing the proportion of Aβ+ participants identified for screening.

METHODS: We used random forest models to evaluate the positive predictive value of demographics,

RESULTS: Predicting Aβ positivity with demographic,

CONCLUSIONS: By incorporating this procedure, clinical trial screening costs of 7500 USD per participant may be reduced by nearly 7 million USD total.

Keywords: APOE; Amyloid; Clinical trials; Cognition; Preclinical Alzheimer's

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