Effectiveness of a Digital Inhaler System for Patients With Asthma: A 12-Week, Open-Label, Randomized Study (CONNECT1)

Abstract

The albuterol Digihaler (albuterol 90 μg/dose) transmits data wirelessly to a smart device application, which synchronizes with a Digital Health Platform to store and transfer data to a web-based Dashboard. The Reliever Digihaler System (RDS) comprises the albuterol Digihaler, application, Digital Health Platform and Dashboard. This allows patients and health care professionals to review reliever inhaler usage and inhalation quality to aid clinical decision making. To demonstrate the effectiveness, as measured by change in asthma control, of the RDS compared with standard of care. In this 12-week study, participants aged 13 years or older with suboptimal asthma control (Asthma Control Test [ACT] score < 19) were randomized to use either RDS or standard of care albuterol reliever inhalers. The health care professionals were recommended at study start to check each participant's inhalation data (including inhalation quantity and quality parameters) 1 or more times per week. Primary outcome was the proportion of participants achieving clinically meaningful improvement in asthma control (ACT score ≥ 20 at week 12 and/or increase ≥ 3 units from baseline). Bayesian statistical analysis provided a posterior probability distribution for odds ratios with corresponding credible intervals. Participants using the RDS (n= 167) had an 85.3% probability of greater odds of clinically meaningful asthma control improvements than those using SoC (n= 166) after 3 months (mean odds ratio 1.33; 95% credible interval 0.813-2.050). In this study, participants using the RDS had greater odds of clinically meaningful improvements in asthma control versus SoC after 3 months. Further investigation of the potential of the RDS to help improve asthma management is warranted.