Recently, there was a debate about whether borderline dysplastic hips should be treated surgically with hip arthroscopy or periacetabular osteotomy (PAO). Current studies recommend a classification into stable and unstable hips. Therefore, radiological scores have been described in recent years. Likewise, a new clinical stability test with the Prone Apprehension Relocation Test (PART) has been described. However, there has been no correlation between the modern radiological scores and the PART. We prospectively studied a consecutive group of patients who presented to our clinic. The PART and radiological scores were assessed in these patients. We divided the patients into a PART-positive and a PART-negative group and analyzed the associated clinical and radiological findings. Out of 126 patients (126 hips) included, 36 hips (29%) were evaluated as PART positive. There were significantly more females in the PART positive group (P = 0.005). Comparing the PART groups, significant differences (P < 0.0001) were found for the lateral center edge angle (LCEA), Femoro-Epiphyseal Acetabular Roof (FEAR) index, Gothic arch angle (GAA), anterior wall index (AWI), the occurrence of the upsloping lateral sourcil (ULS) and signs of acetabular retroversion. The correlation analysis showed an association between LCEA, FEAR index, GAA, AWI, ULS and the PART. A chi-square automatic interaction detection algorithm revealed that the strongest predictor of positive PART was the GAA. In conclusion, a high correlation between the PART and known radiological instability parameters was found. Consequently, a combination of clinical instability testing and radiological instability parameters should be applied to detect unstable hips.

中文翻译：

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Prone Apprehension Relocation Test 与髋关节放射学不稳定性评分显着相关

最近，关于是否应通过髋关节镜或髋臼周围截骨术 (PAO) 手术治疗边缘性发育不良髋关节存在争议。目前的研究建议将髋关节分为稳定髋和不稳定髋。因此，近年来已经描述了放射学评分。同样，已经描述了一种新的临床稳定性测试，即 Prone Apprehension Relocation Test (PART)。然而，现代放射学评分与 PART 之间没有相关性。我们前瞻性地研究了一组到我们诊所就诊的患者。在这些患者中评估了 PART 和放射学评分。我们将患者分为 PART 阳性组和 PART 阴性组，并分析相关的临床和放射学结果。在包括的 126 名患者（126 髋）中，36 髋（29%）被评估为 PART 阳性。PART 阳性组的女性明显更多（P = 0.005）。比较 PART 组，发现外侧中心边缘角 (LCEA)、股骨骺髋臼顶 (FEAR) 指数、哥特式弓角 (GAA)、前壁指数 (AWI)、发生上斜侧源（ULS）和髋臼后倾的迹象。相关性分析显示 LCEA、FEAR 指数、GAA、AWI、ULS 和 PART 之间存在关联。卡方自动交互检测算法显示，阳性 PART 的最强预测因子是 GAA。总之，发现 PART 与已知的放射学不稳定性参数之间存在高度相关性。最后，