Acceptability and face validity of a geriatric self-medication assessment tool

Abstract

Background: A majority of community-dwelling older adults manage their own medication regimens. This study describes the development and first phase of testing of the Self-Medication Assessment Tool (SMAT), designed to screen for cognitive and functional deficits in relation to medication self-management among community-dwelling geriatric patients. Objective: To evaluate the face validity of the SMAT and to determine its acceptability among pharmacists. Methods: An instrument was designed, with 5 assessment scales to measure function, cognition, medication recall, and 2 aspects of adherence. The instrument included a standardized test kit and instructions for testers. Focus groups interviews, individual interviews, and surveys were used to determine the reactions of community and hospital-based pharmacists to the tool. Transcripts of the focus group and individual interviews were coded for main themes. Pharmacists'ratings of usefulness, thoroughness, and ease of use, as well as their willingness to use the instrument, were compared with a neutral rating on a 7-point scale by means of 1-sample t tests. Results: Focus group interviews or individual interviews were conducted with 17 pharmacists and 3 pharmacy students (out of a potential population of about 300) who responded to an invitation to participate. The pharmacists felt that the tool would be useful in identifying difficulties with medication management and potential interventions, and they expressed a willingness to use it in their respective practices. Pharmacists working in hospital settings were slightly more willing than community pharmacists to use the tool. Interviewees highlighted ways to improve the tool before testing of its psychometric properties in the planned second phase of this project. Conclusions: The SMAT had strong face validity and was particularly acceptable for use by pharmacists in hospital settings.