USABILITY SCORES OF A RELIEVER DIGITAL SYSTEM IN PATIENTS WITH UNCONTROLLED ASTHMA

Abstract

<h3>Introduction</h3> The CONNECT1 study (NCT03890666) evaluated the Reliever Digihaler System (RDS) in participants with asthma aged ≥13 years with suboptimal asthma control (Asthma Control Test score <19). The RDS comprises an albuterol Digihaler capable of transmitting data wirelessly to a mobile application (App), which transfers data to a web-based provider-facing Dashboard. This exploratory analysis evaluated usability of the RDS, using data from CONNECT1. <h3>Methods</h3> In this 12-week study, 333 eligible participants were randomized to RDS (N=167) or standard of care (SoC) (N=166). Adult participants using the RDS assessed its usability by completing a 10-question System Usability Scale (SUS) questionnaire to rate the App; investigational site staff used the SUS to rate the Dashboard at Week 12. Questionnaire scores were calculated using a 0–100 scale, with higher numbers representing better usability (an SUS score of 71.1–80.7 means good usability and ≥80.8 indicates excellent usability). SUS scores of participants using the RDS were further categorized by age and ethnicity groups. <h3>Results</h3> Usability of the App was rated ‘Good' by the 140 adult participants who used the RDS (mean SUS score [standard deviation (SD)]: 79.8 [15.7]). Investigational site staff (n=21) rated the Dashboard usability as ‘Good' (mean SUS score [SD]: 74.6 [15.0]). SUS scores were similar across different age and ethnicity groups (Figure). <h3>Conclusion</h3> Participants and investigational site staff rated the RDS as having ‘Good' usability, and it is well-accepted by different age and ethnicity groups, indicating that it can be used in a wide population to help with asthma management.