Understanding information on clinical trials by persons with Alzheimer's dementia. A pilot study

Corinna Porteri, Chiara Andreatta, Livio Anglani, Eugenio Pucci, Giovanni B. Frisoni

Research output: Contribution to journalArticlepeer-review


Background: Because of the growing value attributed to informed consent, competence assessment has become an important task for physicians and researchers, particularly when treatment and research involve persons who may be cognitively impaired, such as those with Alzheimer's dementia. Methods: We developed and validated a 12-item questionnaire to assess the understanding of information about clinical trials by research subjects (score 0 to 24). The 12 questions were selected from a larger pool of 16 through internal consistency validity testing. We used the instrument in a pilot study involving 42 patients with mild to moderate Alzheimer's disease who had been asked to take part in two randomized clinical trials, and 21 caregivers. Results: Patients with Alzheimer's disease had poor understanding (mean global score on questionnaire: 6.1±3.5). Unlike patients, caregivers understand the key elements of the clinical trials (questionnaire mean global score: 21.5±2.3; p for difference with patients

Original languageEnglish
Pages (from-to)158-166
Number of pages9
JournalAging clinical and experimental research
Issue number2
Publication statusPublished - Apr 2009


  • Alzheimer's disease
  • Clinical trials understanding
  • Informed consent
  • Research ethics

ASJC Scopus subject areas

  • Ageing
  • Geriatrics and Gerontology


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