ArticleJournal of orthopaedic surgery and research2025
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.
Article in Journal of orthopaedic surgery and research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
1 citing paper in PubMed.
- Relationship of Baseline Physical Activity and Morphologic Factors in Patients With Lateral Patellar Instability.Orthopaedic journal of sports medicine · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundJ-sign assessment is considered a helpful clinical parameter in the treatment of lateral patellar instability (LPI). However, it is unclear whether there is a correlation between the degree of the J-sign and anatomic risk factors. The aim of this study was to investigate whether there is a correlation between the degree of the J-sign assessed by haptic-visual assessment and anatomic risk factors of LPI.
methodsJ-sign grading was prospectively assessed by two experienced observers in 51 knee joints in 46 patients (male/female 19/32; age 25.1 ± 10 years; ≥ 1 patellar dislocation) according to the quadrant method of Zhang et al. Assessment was done with haptic-visual assessment, including palpation of the medial and lateral patellar facets with the thumb and index finger. The J-Sign grade was correlated with known anatomic risk factors for patellar instability, including the Caton‒Deschamps index, the Dejour type of trochlear dysplasia with additional measurements of trochlear bump height and lateral trochlear inclination angle, the tibial tuberosity–trochlear groove (TT–TG) distance, the tibial tuberosity–posterior cruciate ligament (TT–PCL) distance, the varus/valgus deformity and the total number of anatomic risk factors.
resultsThere was a significant correlation between the J-sign and the Caton–Deschamps index (r1 = 0.51; p < 0.001 and r2 = 0.41; p = 0.005), the total number of anatomic risk factors (r1 = 0.34; p = 0.015 and r2 = 0.30; p = 0.032) and the trochlear bump height (r1 = 0.36; p = 0.021 and r2 = 0.35; p = 0.027) for both raters. Moreover, the results revealed a significant correlation between the J-sign grade assessed by one rater and the TT–TG distance (r1 = 0.31; p = 0.044).
conclusionHaptic-visual assessment of the J-sign revealed a significant correlation with patella height, trochlear bump height, TT–TG distance and the total number of anatomic risk factors for patellar instability.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.