Predictors of instrumental activities of daily living in community-dwelling older adults

Graham J. McDougall, Areum Han, Vincent S. Staggs, David K. Johnson, Joan M. McDowd

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Psychiatric mental health clinicians often rely on proxy and self-report evaluations to determine the cognitive function of older adults however, performance measures have greater accuracy and predictive ability for everyday function. This study tested physical and cognitive predictors of functional abilities in fifty-one community residing older adults. We administered a computerized battery of executive function tasks, a performance-based measure of instrumental activities of daily living (IADL), and three physical function measures (grip strength, 30-second Chair Stand Test, and 8-foot Up and Go). Regression models assessed the associations of three components of executive function (updating, shifting, and inhibition) with IADLs and physical functions. Updating was a significant predictor of the Medications and Financial DAFS scores and of grip strength. Shifting also predicted grip strength. In conclusion, different executive functions predict different domains of IADL functioning. Working memory was a robust predictor of IADL functioning in older adults, especially medication management skills.

Original languageEnglish (US)
Pages (from-to)43-50
Number of pages8
JournalArchives of Psychiatric Nursing
Issue number5
StatePublished - Oct 2019
Externally publishedYes


  • Executive function
  • Instrumental activities of daily living
  • Mental flexibility
  • Physical fitness

ASJC Scopus subject areas

  • Phychiatric Mental Health


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