The reliability and validity of the modified Unified Classification System for periprosthetic femoral fractures after hip arthroplasty
| Autor: | Jian-Jian Shen, Xiao-Hong Fan, Xiao-Lei Chen, Meng-Qiang Fan, Jie-Feng Huang, Xian-Jun Jiang, Xu-Song Li |
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| Rok vydání: | 2021 |
| Předmět: |
Observer Variation
Orthodontics 030222 orthopedics business.industry Arthroplasty Replacement Hip Radiography Reproducibility of Results Periprosthetic Femoral fracture medicine.disease 03 medical and health sciences Hip arthroplasty 0302 clinical medicine Cohen's kappa Humans Medicine Orthopedics and Sports Medicine Surgery Femur Periprosthetic Fractures business Femoral Fractures 030217 neurology & neurosurgery Therapeutic strategy |
| Zdroj: | Journal of Orthopaedic Science. 26:385-388 |
| ISSN: | 0949-2658 |
| DOI: | 10.1016/j.jos.2020.03.008 |
| Popis: | Background This study assessed the reliability and validity of the modified Unified Classification System for femur fractures after hip arthroplasty. Methods Four hundred and two cases were evaluated by 6 observers, 3 experts and 3 trainee surgeons. Each observer read the radiographs on 2 separate occasions and classified each case as to its type. Reliability was assessed by looking at the intraobserver and interobserver agreement using the Kappa statistic. Validity was assessed within the B group by looking at the agreement between the radiographic classification and the intraoperative findings. Interobserver and intraobserver agreement and validity were analyzed, using weighted kappa statistics. Results The mean k value for interobserver agreement was found to be 0.882 (0.833–0.929) for consultants (almost perfect agreement) and 0.776 (0.706–0.836) for the trainees (substantial agreement). Intraobserver k values ranged from 0.701 to 0.972, showing substantial to almost perfect agreement. Validity analysis of 299 type B cases revealed 89.854% agreement with a mean k value of 0.849 (0.770–0.946) (almost perfect agreement). Conclusions This study has shown that the modified Unified Classification System is reliable and valid. We believe it is useful to improve the judgment of the implant stability, and establish the therapeutic strategy for periprosthetic femoral fracture. |
| Databáze: | OpenAIRE |
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