Pilot testing of a new electronic diagnostic support tool (AiD-DST) designed to identify the cause(s) of delirium

Delirium is frequently multifactorial, and causes are often missed in clinical practice. The Aetiology in Delirium - Diagnostic Support Tool (AiD-DST) was developed to improve recognition of the causes. We undertook an evaluation of an electronic version of AiD-DST. A development and evaluation life cycle of improvement was used. In phase 1, alpha testing among the development group evaluated technical performance of AiD-DST. In phase 2, we performed a cycle of beta testing among junior doctors to assess impressions of AiD-DST using Think Aloud methodology. We grouped responses into themes and made changes to AiD-DST by the development group accordingly. In phase 3, usability and acceptance of AiD-DST was assessed using the mHealth App Usability Questionnaire (MAUQ). In phase 1, software issues were identified, and modifications made. In phase 2, feedback was obtained from 29 junior doctors. Three cycles of feedback were obtained. The number of items identified after each cycle were 20, 12 and 7, respectively. Content was grouped into themes of; ‘style and grammar’, ‘formatting’, ‘IT’, ‘missed diagnosis’ and ‘other concerns.’ In phase 3, 20 participants completed MAUQ questionnaire. Overall, the average score was 6.36 (SD=0.8) with 7 as the highest attainable score. This translates to agreement up to strong agreement concerning usability of AiD-DST. After a process of optimisation, AiD-DST has been shown to be a usable and potentially useful diagnostic support tool to help junior doctors identify cause(s) of delirium. An implementation study is planned.