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Predicting recurrence of instability after a primary traumatic anterior shoulder dislocation.
The Bone & Joint Journal ( IF 4.9 ) Pub Date : 2024-10-01 , DOI: 10.1302/0301-620x.106b10.bjj-2023-1454.r1
Navnit S Makaram,Hannes Becher,Erlend Oag,Nicholas R Heinz,Conor J McCann,Samuel P Mackenzie,C M Robinson

Aims The risk factors for recurrent instability (RI) following a primary traumatic anterior shoulder dislocation (PTASD) remain unclear. In this study, we aimed to determine the rate of RI in a large cohort of patients managed nonoperatively after PTASD and to develop a clinical prediction model. Methods A total of 1,293 patients with PTASD managed nonoperatively were identified from a trauma database (mean age 23.3 years (15 to 35); 14.3% female). We assessed the prevalence of RI, and used multivariate regression modelling to evaluate which demographic- and injury-related factors were independently predictive for its occurrence. Results The overall rate of RI at a mean follow-up of 34.4 months (SD 47.0) was 62.8% (n = 812), with 81.0% (n = 658) experiencing their first recurrence within two years of PTASD. The median time for recurrence was 9.8 months (IQR 3.9 to 19.4). Independent predictors increasing risk of RI included male sex (p < 0.001), younger age at PTASD (p < 0.001), participation in contact sport (p < 0.001), and the presence of a bony Bankart (BB) lesion (p = 0.028). Greater tuberosity fracture (GTF) was protective (p < 0.001). However, the discriminative ability of the resulting predictive model for two-year risk of RI was poor (area under the curve (AUC) 0.672). A subset analysis excluding identifiable radiological predictors of BB and GTF worsened the predictive ability (AUC 0.646). Conclusion This study clarifies the prevalence and risk factors for RI following PTASD in a large, unselected patient cohort. Although these data permitted the development of a predictive tool for RI, its discriminative ability was poor. Predicting RI remains challenging, and as-yet-undetermined risk factors may be important in determining the risk.

中文翻译:


预测原发性创伤性肩关节前脱位后不稳定的复发。



目的 原发性创伤性肩关节前脱位 (PTASD) 后复发性不稳定 (RI) 的危险因素尚不清楚。在这项研究中,我们旨在确定 PTASD 后非手术治疗的大型患者队列的 RI 发生率,并开发临床预测模型。方法 从创伤数据库中确定了 1,293 例非手术治疗的 PTASD 患者 (平均年龄 23.3 岁 (15 至 35 岁;14.3% 为女性)。我们评估了 RI 的患病率,并使用多变量回归模型来评估哪些人口统计学和伤害相关因素可以独立预测其发生。结果 平均随访 34.4 个月时 RI 的总体发生率 (SD 47.0) 为 62.8% (n = 812),其中 81.0% (n = 658) 在 PTASD 两年内首次复发。中位复发时间为 9.8 个月 (IQR 3.9 至 19.4)。增加 RI 风险的独立预测因素包括男性 (p < 0.001)、PTASD 年龄较小 (p < 0.001)、参与接触性运动 (p < 0.001) 和骨性 Bankart (BB) 病变的存在 (p = 0.028)。大粗隆部骨折 (GTF) 具有保护作用 (p < 0.001)。然而,所得预测模型对 RI 两年风险的判别能力很差 (曲线下面积 (AUC) 0.672)。排除 BB 和 GTF 的可识别放射学预测因子的亚组分析使预测能力变差 (AUC 0.646)。结论 本研究阐明了大型、未经选择的患者队列中 PTASD 后 RI 的患病率和危险因素。尽管这些数据允许开发 RI 的预测工具,但其判别能力很差。预测 RI 仍然具有挑战性,尚未确定的风险因素对于确定风险可能很重要。
更新日期:2024-10-01
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