Selecting outcomes for pragmatic clinical trials in dementia care: The IMPACT Collaboratory iLibrary

Many interventions improve care and outcomes for people with Alzheimer's Disease and related dementias (ADRD), yet are never disseminated. Pragmatic trials facilitate the adoption and dissemination of best practices, but gaps in pragmatic outcome measurement are a critical obstacle. Our objectives are (1) to describe the development and structure of the IMbedded Pragmatic ADRD Clinical Trials Collaboratory (IMPACT) iLibrary of potential outcome measures for ADRD pragmatic trials, and (2) to assess their pragmatic characteristics.

We identified potential outcome measures from several sources: a database of administrative and clinical outcome measures from ADRD clinical trials registered in ClinicalTrials.gov, published reviews, and IMPACT pilot pragmatic trial outcome measures. The iLibrary reports (a) number of items, (b) completion time, (c) readability for diverse populations, (d) cost or copyright barriers to use, (e) method of administration, (f) assessor training burden, and (g) feasibility of data capture and interpretation in routine care; a summary of pragmatic characteristics of each outcome measure (high, moderate, low); items or descriptions of items; and links to primary citations regarding development or psychometric properties.

We included 140 outcome measures in the iLibrary: 66 administrative (100% were pragmatic) and 74 clinical (52% were pragmatic). The most commonly addressed outcome domains from administrative assessments included physical function, quality of care or communication concerns, and psychological symptoms or distress behaviors. The most commonly addressed outcome domains from clinical assessments were psychological symptoms or distress behaviors, physical function, cognitive function, and health-related quality of life.

Pragmatic outcome measures are brief, meaningful to diverse populations, easily scored and interpreted by clinicians, and available in electronic format for analysis. The iLibrary can facilitate the selection of measures for a wide range of outcomes relevant to people with ADRD and their care partners.