Inter-rater Reliability of the Classification of the J-Sign Is Inadequate Among Experts.
Clin J Sport Med
; 32(5): 480-485, 2022 09 01.
Article
em En
| MEDLINE
| ID: mdl-36083327
ABSTRACT
OBJECTIVE:
The purpose of this study was to determine the inter-rater and intra-rater reliability of the symmetry, classification, and underlying pathoanatomy associated with the J-sign in patients with recurrent lateral patellofemoral instability. STUDYDESIGN:
Blinded, inter-rater reliability study.SETTING:
N/A.PARTICIPANTS:
Thirty patellofemoral joint experts.INTERVENTIONS:
Thirty clinicians independently assessed 30 video recordings of patients with recurrent lateral patellofemoral instability performing the J-sign test. MAIN OUTCOMEMEASURES:
Raters documented J-sign symmetry and graded it according to the quadrant and Donell classifications. Raters indicated the most significant underlying pathoanatomy and presence of sagittal plane maltracking. Intra-rater reliability was assessed by 4 raters repeating the assessments. Mean pairwise simple and/or weighted Cohen's kappa were performed to measure inter-rater and intra-rater reliability, as well as calculation of percent agreement.RESULTS:
J-sign symmetry demonstrated fair inter-rater reliability (k = 0.26), whereas intra-rater reliability was moderate (k = 0.48). Inter-rater reliability for the quadrant and Donell classifications indicated moderate agreement, k = 0.51 and k = 0.49, respectively, whereas intra-rater reliability was k = 0.79 and k = 0.72, indicating substantial agreement. Inter-rater reliability of the foremost underlying pathoanatomy produced only slight agreement (k = 0.20); however, intra-rater reliability was substantial (k = 0.68). Sagittal plane maltracking demonstrated slight inter-rater agreement (k = 0.23) but substantial intra-rater agreement (k = 0.64).CONCLUSIONS:
The symmetry, classification, and underlying pathoanatomy of the J-sign demonstrated fair to moderate inter-rater reliability and moderate to substantial intra-rater reliability among expert reviewers using video recordings of patients with recurrent lateral patellofemoral instability. These findings suggest individual raters have a consistent standard for assessing the J-sign, but that these standards are not reliable between assessors. LEVEL OF EVIDENCE III.
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Base de dados:
MEDLINE
Assunto principal:
Articulação Patelofemoral
Tipo de estudo:
Guideline
Limite:
Humans
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article