Is the Clinician's Eye a Valid and Reproducible Tool for Diagnosing Patella Alta on a Lateral Knee Radiography?

Journal of the American Academy of Orthopaedic Surgeons. Global Research & Reviews
Alex B VaismanDavid P Figueroa

Abstract

Validity and reproducibility of the clinician's eye (CE) to diagnose patella alta (PA) on a lateral knee radiography (radiograph) is unknown. Cross-sectional study of 46 lateral knee x-rays. Three blind observers used CE, Insall-Salvati (IS), modified Insall-Salvati (mIS), and Caton-Deschamps (C-D) to determine patellar height. Sensitivity and specificity of each observer was compared with the musculoskeletal radiologist's C-D measurements. Intraobserver and interobserver agreement were assessed with intraclass correlation coefficient and Fleiss κ, respectively. Time needed to estimate patellar height for every method was recorded in seconds. Statistical differences between observers were calculated with a generalized estimating equation. Analysis of variance and post hoc Bonferroni test compared duration of each method (P < 0.05). Data were analyzed using Stata 15 (StataCorp). CE, IS, mIS, and C-D's sensitivity and specificity values are as follows: 77%, 92%; 94%, 52%; 67%, 58%; and 53%, 89%, respectively. Intraclass correlation coefficient and Fleiss κ of CE, IS, mIS, and C-D values are as follows: 0.66 and 0.43, 0.88 and 0.68, 0.54 and 0.09, and 0.68 and 0.59, respectively. CE was the second most sensitive and most specific ...Continue Reading

References

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May 16, 2019·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Fleur V VerhulstSander Koëter

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Citations

Jan 30, 2021·Journal of the American Academy of Orthopaedic Surgeons. Global Research & Reviews·Rodrigo GuiloffAlex Vaisman
May 15, 2021·Journal of the American Academy of Orthopaedic Surgeons. Global Research & Reviews·Dinko Nizić

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