OBJECTIVE  The aim of this study was to describe the contribution of signalment and habitual activity in the development of cruciate ligament rupture (CR) in Labrador Retrievers. STUDY DESIGN  Four hundred and twelve client-owned purebred Labrador Retrievers were recruited. Dogs were assigned either as affected with CR or as controls based on signalment, physical examination and radiographic evidence of disease. Clients were asked to complete a questionnaire related to signalment, concurrent disease and a questionnaire pertaining to their dog's activity before development of CR or general activity during the dog's most active years. RESULTS  Habitual activity was not significantly different between dogs affected with CR and controls. There was no significant difference in neuter status or body weight between CR affected dogs and controls. Labrador Retrievers with a yellow coat, and Labradors that did not maintain an optimal body weight in the opinion of their veterinarian were at increased risk of developing CR. CONCLUSIONS  Habitual activity level is not a risk factor for development of CR in Labrador Retrievers. Our study did not show neuter status, sex or body weight to be risk factors for CR. However, coat colour and not sustaining optimal body condition are significant risk factors for CR.

中文翻译：

---

习惯活动对拉布拉多猎犬十字韧带断裂的贡献。

目的本研究的目的是描述信号传导和习惯性活动在拉布拉多犬十字韧带破裂（CR）发展中的作用。研究设计招募了412个客户拥有的纯种拉布拉多猎犬。根据疾病的信号，体格检查和影像学证据，将狗分为CR感染者或对照组。要求客户在CR发生之前或在狗最活跃的几年中完成一般活动之前，完成与信号，并发疾病有关的问卷以及与他们的狗活动有关的问卷。结果患CR的狗与对照组之间的习惯活动没有显着差异。CR感染的狗和对照组之间的中性状态或体重无显着差异。穿着黄色外套的拉布拉多犬，以及在兽医看来没有保持最佳体重的拉布拉多犬患CR的风险增加。结论习惯活动水平不是拉布拉多犬发生CR的危险因素。我们的研究未显示中性状态，性别或体重是CR的危险因素。但是，毛色和不能维持最佳身体状态是CR的重要危险因素。