Related Experiment Video
Updated: May 3, 2026
Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
Radiographic grading of femoral stem cementation in hip arthroplasty
Flávio Luís Garcia1, Arthur Tomotaka Sugo1, Celso Hermínio Ferraz Picado1
1Department of Biomechanics, Medicine and Rehabilitation of the Musculoskeletal System of Faculdade de Medicina de Ribeirão Preto (USP) - Ribeirão Preto, SP, Brazil.
Objective:
To determine intra and interobserver agreement of the grading system for femoral cementation in hip arthroplasty proposed by Barrack.
Methods:
Immediate anteroposterior and lateral postoperative radiographs of 55 primary total hip arthroplasties were assessed by two observers familiar with the use of this grading system. The assessments were performed on two separate occasions by each observer and independently. The statistical analysis measured the Kappa coefficient, which determines the degree of agreement between tests with categorical variables.
Results:
Intraobserver Kappa coefficient varied from 0.43 to 0.68, demonstrating moderate to substantial strength of agreement; interobserver Kappa coefficient varied from 0.19 to 0.44, demonstrating slight to moderate strength of agreement.
Conclusion:
Intra and particularly interobserver agreement are limited in this grading system, even when used by trained individuals. Level of Evidence III, Study of nonconsecutive patients; without consistently applied reference "gold" standard.
