Assessing the Quality of Decision Support Technologies Using the International Patient Decision Aid Standards instrument (IPDASi)

• DOI: 10.1371/journal.pone.0004705
• Publication Date: 2009-03-03T18:59:51Z
• Authors: Glyn Elwyn; Annette M. O'Connor; Carol Bennett; Robert G. Newcombe; Mary Politi; Marie-Anne Durand; Elizabeth Drake; Natalie Joseph-Wi...; Sara Khangura; Anton Saarimaki; Stephanie Sivell; Mareike Stiel; Steven J. Bernstein; Nananda Col; Angela Coulter; Karen Eden; Martin Härter; Margaret Holmes R...; Nora Moumjid; Dawn Stacey; Richard Thomson; Tim Whelan; Trudy van der Wei...; Adrian Edwards
• Keywords: Decision aids

Objectives To describe the development, validation and inter-rater reliability of an instrument to measure quality patient decision support technologies (decision aids). Design Scale development study, involving construct, item scale testing. Setting There has been increasing use – adjuncts discussions clinicians have with patients about difficult decisions. A global interest in developing these interventions exists among both for-profit not-for-profit organisations. It is therefore essential internationally accepted standards assess their process, content, potential bias method field testing evaluation. Methods Participants Twenty-five researcher-members International Patient Decision Aid Standards Collaboration worked together develop (IPDASi). In fourth Stage (reliability study), eight raters assessed thirty randomly selected technologies. Results IPDASi measures 10 dimensions, using 47 items, provides overall score (scaled from 0 100) for each intervention. Overall scores ranged 33 82 across sampled (n = 30), enabling discrimination. The intraclass correlation was 0.80. Correlations dimension were all positive (0.31 0.68). Cronbach's alpha values 8 0.72 0.93. alphas based on means 0.50 0.81, indicating that although well correlated, different aspects technology quality. short version (19 items) also developed had very similar mean high between 0.87 (CI 0.79 0.92). Conclusions This work demonstrates ability existing assessment a DST's components will be used as tool provide formative advice DSTs developers summative assessments those who want compare tools against benchmark.