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Home / Equine Research Bank / Equine Vet J / Descriptive analysis of retirement of Thoroughbred racehorse...
Equine veterinary journal2007; 39(2); 143-148; doi: 10.2746/042516407x159132

Descriptive analysis of retirement of Thoroughbred racehorses due to tendon injuries at the Hong Kong Jockey Club (1992-2004).

Abstract: This study was part of a programme to optimise the longevity and maximise the health and welfare of the Thoroughbred racehorses in Hong Kong. Injuries to the superficial digital flexor (SDF) tendon are the most common veterinary reason for premature retirement in this population. Objective: To describe the frequency and pattern of retirements associated with SDF tendon injuries in Thoroughbred racehorses and to compare the characteristics of these horses with those that retired for other reasons. Methods: A retrospective analysis of retirement records documented in the Hong Kong Jockey Club clinical database between 1992 and 2004 was conducted. As this is complete census data, no statistical inference to the population is necessary. Results: The mean annual cumulative incidence of retirements due to tendon injury was 3.2% accounting for 14% of all retirements. The risk of tendon injury increased over the 12 year period from 23-4.2%. The racing career, number of starts and earnings of horses retired with tendon injuries were reduced by 25.6, 41.2 and 53.3%, respectively. Thirteen percent of these horses never raced in Hong Kong. A greater proportion of 3- and 4-year-olds and entire males were retired because of tendon injuries. Ninety-seven percent of injuries affected the forelimb, the right more frequently than the left. Only 19.7% of retired horses that had received ultrasound examination for SDF tendon injury retired for this reason. Conclusions: This study provides population based data on the frequency, career and economic losses associated with tendon injury induced retirement. Conclusions: This descriptive study has provided a useful resource for further case-control studies to investigate risk factors for retirement from racing due to tendon injury. This is the first step toward the development of management tools to reduce the incidence of tendon injury related retirement in Hong Kong.
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Publication Date: 2007-03-24 PubMed ID: 17378443DOI: 10.2746/042516407x159132Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This study examines the retirement rate of Thoroughbred racehorses in Hong Kong due to tendon injuries, identifies the prevalence and patterns of these retirements, and compares these horses’ characteristics with those retired for other reasons. This is the first step towards developing strategies to reduce the incidence of tendon injury-related retirement in Hong Kong’s racehorses.

Objective and Methods

This research investigates the frequency, pattern and impacts of retirement associated with Superficial Digital Flexor (SDF) tendon injuries in Thoroughbred racehorses. Comparative analysis was made with those horses that retired due to non-tendon injury reasons. Researchers performed a retrospective analysis of retirement records from 1992 to 2004 using data from the Hong Kong Jockey Club clinical database.

  • As the data of all the retired horses was available, there was no need for statistical inference.

Results

The research results reveal several key findings:

  • The average annual cumulative incidence of retirements due to tendon injury was 3.2%, accounting for 14% of all retirements.
  • The risk of tendon injury increased from 2.3% to 4.2% over the 12-year period.
  • The racehorses that retired due to tendon injuries had comparatively shorter careers, lesser starts, and lower earnings, reduced by 25.6%, 41.2%, and 53.3% respectively.
  • Younger horses (3- and 4-year-olds) and uncastrated male horses were more likely to retire due to tendon injuries.
  • A significant 97% of the injuries affected the forelimb, with the right limb affected more frequently than the left.
  • Among the retired horses that underwent ultrasound examination for SDF tendon injury, only 19.7% retired for this reason.

Conclusions and Future Directions

The research provides comprehensive data on the impacts and prevalence of tendon injury-induced retirements in Thoroughbred racehorses in Hong Kong. It supplies significant information for future case-control studies to investigate the risk factors leading to retirement due to tendon injuries, contributing to the development of management tools to reduce such instances.

This study is the first step towards understanding and improving the longevity, health, and welfare of Thoroughbred racehorses in Hong Kong by reducing tendon injury-related retirements.

Cite This Article

APA
Lam KH, Parkin TD, Riggs CM, Morgan KL. (2007). Descriptive analysis of retirement of Thoroughbred racehorses due to tendon injuries at the Hong Kong Jockey Club (1992-2004). Equine Vet J, 39(2), 143-148. https://doi.org/10.2746/042516407x159132

Publication

Equine veterinary journal
ISSN: 0425-1644
NlmUniqueID: 0173320
Country: United States
Language: English
Volume: 39
Issue: 2
Pages: 143-148

Researcher Affiliations

Lam, K H
  • Department of Veterinary Regulation and International Liaison, Hong Kong Jockey Club, Sha Tin, N.T., Hong Kong.
Parkin, T D H
    Riggs, C M
      Morgan, K L

        MeSH Terms

        • Age Factors
        • Animal Welfare
        • Animals
        • Female
        • Forelimb / injuries
        • Horses / injuries
        • Male
        • Physical Conditioning, Animal / adverse effects
        • Prevalence
        • Retrospective Studies
        • Risk Factors
        • Sex Factors
        • Sports
        • Tendon Injuries / diagnosis
        • Tendon Injuries / diagnostic imaging
        • Tendon Injuries / veterinary
        • Ultrasonography

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