Department of Clinical Studies, New Bolton Center, University of Pennsylvania, Kennett Square, Pennsylvania, USA.
Rood and Riddle Equine Hospital, Lexington, Kentucky, USA.
Equine Vet J. 2020 Jan;52(1):52-58. doi: 10.1111/evj.13122. Epub 2019 May 10.
Epiglottic entrapment can occur in yearling Thoroughbreds (TB); however, race performance following surgical correction is unknown.
To determine the race performance of horses treated surgically for epiglottic entrapment as yearlings as compared to an untreated cohort. A second objective was to identify risk factors for treated horses not racing post-operatively.
Retrospective cohort and case-control studies.
Medical (1989-2014) and race records of 66 treated TB racehorses were reviewed. Observed abnormalities on pre- and post-operative endoscopic images and surgical method were recorded. Race records (EquineLine) were recorded. Racing performance of treated yearling TBs and two of their maternal half-siblings, which were used as the untreated cohort, was evaluated in a cohort study. A case-control study was used to investigate risk factors for not racing post-operatively among treated horses. Quarterly starts and earnings were compared to an untreated cohort. Survival analysis was used to assess career longevity. Rates of racing and earnings were compared between groups using Poisson and negative binomial regression respectively. Associations between clinical variables and not racing post-surgery were evaluated using logistic regression.
Sixty-six treated horses were identified, 65 of which had at least one half-sibling. Proportions of horses that raced were similar for treated and maternal cohorts (70.0 vs. 70.8%, P = 0.9). Treated horses performed similarly to untreated horses. In treated horses, epiglottic entrapment with abnormal right arytenoid movement was associated with never racing (OR 15.40, 95% CI 1.64-144.23, P = 0.02). More females were affected by epiglottic entrapment than males (47/66 vs. 19/66 respectively, P<0.001).
The retrospective design over a prolonged period of time with cases obtained from a single hospital population. Low case numbers likely influenced the outcome of the multivariable analysis.
Thoroughbred racehorses treated in their yearling year for epiglottic entrapment had no differences in performance variables compared to their untreated cohort. Epiglottic entrapment with abnormal right arytenoid movement might decrease odds of racing post-operatively.
会厌陷闭可发生于育马年度的纯血马（TB）中；然而，其术后的比赛表现情况尚不清楚。
与未经治疗的队列相比，确定接受手术治疗的会厌陷闭育马年度的比赛表现情况。第二个目的是确定术后未参赛的治疗马的风险因素。
回顾性队列和病例对照研究。
回顾了 66 匹接受手术治疗的 TB 赛马的医疗（1989-2014 年）和比赛记录。记录了术前和术后内镜图像上观察到的异常情况和手术方法。使用 EquineLine 记录了比赛记录。在队列研究中，评估了接受治疗的育马年度 TB 及其两个母半同胞的比赛表现情况，将其作为未经治疗的队列。病例对照研究用于调查术后未参赛的治疗马的风险因素。每季度的出赛和奖金与未经治疗的队列进行比较。使用生存分析评估职业寿命。使用泊松和负二项回归分别比较两组的比赛和奖金率。使用逻辑回归评估临床变量与术后不参赛之间的关系。
确定了 66 匹接受治疗的马，其中 65 匹至少有一个母半同胞。治疗组和母本队列的赛马比例相似（70.0%对 70.8%，P=0.9）。治疗马的表现与未经治疗的马相似。在接受治疗的马中，伴有右侧杓状软骨运动异常的会厌陷闭与从未参赛有关（OR 15.40，95%CI 1.64-144.23，P=0.02）。与雄性（47/66 对 19/66）相比，雌性更容易受到会厌陷闭的影响（P<0.001）。
回顾性设计，时间跨度长，病例来自单个医院人群。病例数量低可能影响多变量分析的结果。
在育马年度接受手术治疗的会厌陷闭的纯血马年度赛马在表现变量方面与未经治疗的队列没有差异。伴有右侧杓状软骨运动异常的会厌陷闭可能会降低术后参赛的几率。
