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Testing the usability and acceptability of the NON-STOP app for children with Perthes' disease

Adam M Galloway1,2, David J Keene3, Kerry Cleary2,4

  • 1Leeds Teaching Hospitals NHS Trust, Leeds, UK.

Bone & Joint Open
|January 12, 2026
PubMed

Insights

The NON-STOP app is a usable and acceptable digital tool for children with Perthes' disease, improving self-management. This study prepared the app for a major clinical trial comparing surgical and non-surgical treatments.

Area of Science:

  • Pediatric Orthopedics
  • Digital Health Interventions
  • Health Services Research

Background:

  • Perthes' disease is a childhood hip condition requiring extensive management.
  • Families and clinicians need better self-management tools for pediatric patients.
  • The NON-STOP app was developed to support children with Perthes' disease.

Purpose of the Study:

  • To assess the usability and acceptability of the NON-STOP digital self-management app.
  • To gather preliminary data for a definitive clinical trial.
  • To refine the app based on user feedback.

Main Methods:

  • A mixed-methods study including observational before-and-after design and focus groups.
  • 31 children with Perthes' disease used the NON-STOP app for six weeks.
  • Data collected included app engagement, usability (Health ITUES), quality of life, and physical activity.

Main Results:

  • The NON-STOP app demonstrated high usability and acceptability among users.
  • App engagement was highest in the initial weeks, with a subsequent decrease.
  • Users found the app more engaging than traditional methods, appreciating rewards and avatars.

Conclusions:

  • The NON-STOP app is a viable and well-received tool for pediatric Perthes' disease self-management.
  • User feedback has guided app improvements for future clinical integration.
  • The findings support the app's use in the upcoming Op NON-STOP trial.
Abstract

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