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92 Good short-term effect of self-management rehabilitation is associated with long-term successful outcome in adolescents with Patellofemoral Pain and Osgood-Schlatter
  1. Michael Skovdal Rathleff1,2,
  2. Kristian Thorborg3,
  3. Alessandro Andreucci2,
  4. Henrik Riel1
  1. 1Department of Health Science and Technology, Aalborg University, Denmark
  2. 2Center for General Practice at Aalborg University, Aalborg University, Denmark
  3. 3Sports Orthopaedic Research Center – Copenhagen (SORC-C), Department of Orthopedic Surgery, Amager-Hvidovre Hospital, Institute for Clinical Medicine, Copenhagen University, Denmark


Introduction Short-term self-reported changes may be more strongly associated with long-term prognosis as they describe a disease trajectory and not a state. This study aimed to investigate the association between Global Rating of Change (GROC) after 4 weeks and the outcome after 12 months among adolescents with non-traumatic knee pain (Patellofemoral Pain (PFP) or Osgood-Schlatter (OSD)).

Material and Methods We included data from two prospective clinical trials including adolescents (aged 10–14 years) with PFP (N=151) or OSD (N=51) who underwent a self-management rehabilitation programme including education and exercise. Primary outcome was a 7-point GROC ranging from “much improved” to “much worse”. Adolescents were considered to have a successful outcome if they reported being “much improved” or “improved”. Outcomes were collected after 4 weeks and 12 months.

Results Among adolescents with an unsuccessful outcome after 4 weeks (58% of all adolescents), 78% had a successful outcome after 12 months. Among those with a successful outcome after 4 weeks (42% of all adolescents), 94% had a successful outcome after 12 months. Having a successful outcome after 4 weeks increased the relative risk of a successful outcome after 12 months (relative risk 1.21 (95%CI: 1.07–1.38) and absolute risk difference: 16%.

Conclusion Self-reported improvement after 4-weeks of treatment is associated with better outcomes after 12 months. Importantly, despite no improvement after 4 weeks, a large proportion of adolescents between 10 and 14 years of age will report improvement after 12 months. This highlights the importance of following the rehabilitation programme irrespective of short-term improvements.

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