This study's aim was to determine the effects of dam age and parity on the rate of fracture in offspring in Thoroughbred racehorses in training for flat racing. It was hypothesised that first foals and those from older mares would have a higher fracture rate than subsequent foals and those from younger mares. A two-year observational cohort study collected data from eight trainers on 335 horses that were monitored since the start of their training as yearlings. Multivariable Poisson regression analyses showed that first foals had a significantly lower fracture rate than subsequent ones (RR = 0.33; 95% CI = 0.12, 0.89; P = 0.02) and rate of fracture decreased with increasing dam age (RR = 0.91 per year increase in dam age; 95% CI = 0.83, 0.99; P = 0.03). This study shows for the first time that the rate of equine injury may be influenced by factors that affect skeletal development. Further research on intra-uterine and peri-natal determinants of injury risk in later life in horses is needed.
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机译：这项研究的目的是确定纯种赛马在进行平地竞速训练时，水坝年龄和胎次对子代骨折率的影响。假设首先的小马驹和来自较早母马的马驹的骨折率要比随后的小马驹和来自较年轻的母马的马驹。一项为期两年的观察性队列研究从八岁教练那里收集了335匹马的数据，这些数据自一岁鸽训练开始以来就受到了监测。多变量Poisson回归分析显示，第一批小马驹的骨折率明显低于后续小马驹（RR = 0.33; 95％CI = 0.12，0.89; P = 0.02），并且随着大坝年龄的增加骨折率降低（RR = 0.91每年增加）水坝年龄; 95％CI = 0.83，0.99; P = 0.03）。这项研究首次表明马损伤的发生率可能受到影响骨骼发育的因素的影响。需要进一步研究子宫内和围产期对马的晚年伤害风险的决定因素。
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