ArticleJournal of experimental orthopaedics2025
The ability of the Knee Osteoarthritis Outcome Score to detect changes over time is limited in patients with patellar instability due to substantial ceiling effect.
Article in Journal of experimental orthopaedics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
3 citing papers in PubMed.
- Article
- Estimation of the patient acceptable symptom state (PASS) threshold for the Banff Patellofemoral Instability Instrument 2.0.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Article
- The ability of the Knee Osteoarthritis Outcome Score to detect changes over time is limited in patients with patellar instability due to substantial ceiling effect.Journal of experimental orthopaedics · 2025Article
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Purpose: The purpose of the current study was to evaluate important aspects of interpretability (floor and ceiling effects) for the Knee injury and Osteoarthritis Outcome Score (KOOS) in patients with patellar instability. Secondarily, the study aims to provide minimal important clinical difference (MICD) values for all subscales in this patient category. Methods: Patients undergoing patella stabilising surgery with an individualised approach based on anatomic deviation were prospectively included if (1) ≥13 years of age at the time of surgery, (2) fluent in Norwegian and (3) able to understand and complete the questionnaires. Patients were excluded if they had concomitant bony and/or knee ligament injuries. KOOS was completed before and 6 months after surgery. Results: A substantial ceiling effect was present in the KOOS subscales Conclusion: The substantial ceiling effect in the current implies that the KOOS is not suited to evaluate the long-term effect of treatment in patients with patellar instability. Level of Evidence: Level II.
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Registered trials
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