757 BO30 – Intervention ‘strengthen your ankle’ still going strong 10 years after development

Background Lateral ankle sprains are one of the most common sports injuries. The intervention 'Strengthen your ankle' to prevent recurrent ankle sprains is developed and implemented since 2009, but current implementation success is unknown. Objective To evaluate current implementation success of 'Strengthen your ankle' , and to gain insight in intermediaries and end-users needs for improvements. Design In 2022 a quantitatively process evaluation took place via online questionnaires. Setting The process evaluation was conducted among intervention users and relevant intermediaries. Also, Google analytics were used. Participants 181 users and 184 intermediaries. Intervention 'Strengthen your Ankle' is an intervention consisting of a proven (cost) effective exercise program for the prevention of secondary ankle injuries, and available in an free App (IOS/Android), and fold-out card. Main outcome measurements RE-AIM framework was used to evaluate the app. Reach was defined as number of downloads of the app since January 2018, effectiveness as satisfaction with the intervention, adoption as frequency of use, implementation as barriers and facilitators of use and maintenance as intention of/recommendation for future use. Results 129,300 downloads were counted in 66 months (Jan 2018-Jul 2023), on average 1960 downloads per month. The app received an average score of 8. The IOS app has been used at least 173,000 times, the Android app 85,250 times. The user data of the Android app is however incomplete. Furthermore, 70% expect to suffer an ankle injury less quickly in the future due to the app. Satisfaction with the exercises is high. But the design of the app is outdated. Almost all patients would recommend the app (93%). Of the intermediaries familiar with the app, 70% have used the app to prevent recurrent ankle ligament injuries in athletes. Conclusion The Intervention 'Strengthen your Ankle' is still widely used and positively assessed 10 years after development.