ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2022
The J-sign and the body mass index determine the disease-specific quality of life in patients with lateral patellar instability.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 25 citations in OpenAlex.
- In Vivo Classification of Patellar Motion Trajectories in Individuals: A 4D-CT-Based Study with Unsupervised Clustering.Diagnostics (Basel, Switzerland) · 2026Article
- Haptic Visual and Superimposed Digital Imaging Analysis Improves the Interrater Reliability of J-Sign Assessment in Patients with Patellofemoral Instability: A Prospective Diagnostic Study.Journal of clinical medicine · 2025Article
- Accuracy of the visual assessment of patellar tracking is poor and is influenced by trochlear dysplasia.Journal of experimental orthopaedics · 2025Article
- Haptic-visual evaluation of the J-Sign revealed a significant correlation with patella height, tibial tubercle - trochlear groove distance, trochlear bump height and the total number of risk factors for lateral patellar instability.Journal of orthopaedic surgery and research · 2025Article
- Thin flap sulcus-deepening trochleoplasty in patellar instability yields good functional outcomes without progressive cartilage deterioration in the short-term follow-up-A retrospective single-surgeon cohort study.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- Elevated Instability Resolution Angle Predicts Inferior Patient-Reported Outcomes in Isolated Medial Patellofemoral Ligament Reconstruction.Arthroscopy, sports medicine, and rehabilitation · 2025Article
- Preoperative subjective assessment of disease-specific quality of life significantly influenced the likelihood of achieving the minimal clinically important difference after surgical stabilization for recurrent lateral patellar instability.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- Comparison of Clinical and Radiological Outcomes With Body Mass Index After Medial Patellofemoral Ligament Reconstruction.Orthopaedic journal of sports medicine · 2024Article
- Management of the first episode of traumatic patellar dislocation: an international survey.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Article
- When Should Bony Correction Be Considered in Addition to Medial Patellofemoral Ligament Reconstruction? Results of a Clinically Derived 2-Group Classification of Lateral Patellar Instability Based on 122 Patients at 2- to 5-Year Follow-up.Orthopaedic journal of sports medicine · 2023Article
- [Mid-term effectiveness analysis of combined knee extensor mechanism realignment with bone anchor for recurrent patella dislocation].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2022Article
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Authors and funding
4 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo determine which risk factors for patellar instability contribute most relevantly to patients' subjective disease-specific quality of life, aiming to provide implications on the overall treatment decision-making process.
methodsA total of 182 consecutive patients (male/female 70/112; mean age 23.6 ± 7.3 years) with a history of patellar instability were prospectively enrolled in this study. Patient age, body mass index (BMI), number of dislocations, reversed dynamic patellar apprehension test (ReDPAT), J-sign severity, and pathoanatomic risk factors of patellar instability were assessed. The statistical analysis evaluated the relationships among those variables and determined their ability to predict the Banff Patellofemoral Instability Instrument 2.0 (BPII 2.0) as a disease-specific quality of life measure. Using Spearman correlation, ANOVA and Fisher's exact test, all variables with ANOVA p ≤ 0.1 or Spearman's abs (rho) > 0.1 were entered into a multivariate linear model using backward-stepwise selection.
resultsAnalysis of the individual variables' ability to predict BPII 2.0 score values revealed 'age', 'BMI', 'ReDPAT', 'high grade of trochlear dysplasia', and 'high-grade J-Sign' as possible relevant factors. Backward-stepwise multivariate regression analysis yielded a final parsimonious model that included the factors 'BMI' and 'J-Sign (Grade II and III)' as the most relevant parameters influencing BPII 2.0 score values (adjusted R
conclusionThe results of this study indicate that in patients with lateral patellar instability, a high-grade J-sign and an increased BMI significantly impact subjective disease-specific quality of life. LEVEL OF EVIDENCE: Level IV.
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