科研之友
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摘要
Purpose: To compare the prevalence of femoroacetabular impingement (FAI) radiographic findings between patients aged younger than 50 years and those aged 50 years or older who underwent total hip arthroplasty. Methods: Total hip arthroplasty patients aged younger than 50 years and those aged 50 years or older were identified retrospectively from a facility medical record database. Fifty patients from each group were randomly selected, and preoperative radiographs were collected. Dysplastic, inflammatory, post-traumatic, and osteonecrosis patients were excluded. Radiographs were evaluated for FAI-specific findings. Intraobserver and interobserver reliability was evaluated with kappa statistics for categorical variables and intraclass correlation coefficients for continuous variables. An independent t test was used to compare continuous variables, chi(2) analysis was used for discrete variables, and a z ratio was used to analyze proportions. Results: The mean age between the subgroups of patients aged younger than 50 years and those aged 50 years or older (43 years and 68 years, respectively) was significantly different (P %26lt; .05). Findings in the subgroup aged younger than 50 years included significantly more men (P %26lt; .001), decreased lateral joint space with maintained medial joint space (P %26lt; .05), significantly greater alpha angle on both the anteroposterior view and the frog-leg lateral view (P %26lt; .05), significantly higher Tonnis and Sharp angles (P %26lt; .01), and significantly lower center-edge angle (P %26lt; .001). Conclusions: This retrospective case series shows an increased prevalence of FAI findings (specifically cam pathology) in a patient population aged younger than 50 years undergoing total hip arthroplasty when compared with a cohort aged 50 years or older. Level of Evidence: Level III, retrospective comparative study.
- 出版日期2013-7
