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Equine veterinary journal2007; 39(5); 430-437; doi: 10.2746/042516407x183162

Risk factors for Thoroughbred racehorse fatality in flat starts in Victoria, Australia (1989-2004).

Abstract: Research into risk factors specific for fatality in flat racing should be focused at a regional level as the risk factors may differ among countries and even regions within countries. Objective: To identify risk factors for fatality of Thoroughbred racehorses in flat starts on all racecourses in Victoria, Australia between 1989 and 2004. Methods: Fatalities comprised all horses that died during or immediately after a flat race or official flat trial, and all horses that were subjected to euthanasia within 24 h of an event in which an injury was sustained. The retrospective study involved 283 case starts and 3307 control starts. Univariable and multivariable backward stepwise logistic regression was used to identify risk factors for fatality at any one start. Results: In the final multivariable model, horse gender, prior racing history, race length, racing year, racecourse location and track rating were associated with fatality. Conclusions: This study identified specific risk factors for fatality. The findings are consistent with the hypothesis that horses accumulating high speed exercise are predisposed to catastrophic injury. The study has also highlighted the need to investigate further the adverse effects of different track ratings on the incidence of injury and subsequent fatality. Conclusions: The results will facilitate the development of effective strategies to improve overall safety of horses and jockeys in flat racing in Victoria, Australia.
Publication Date: 2007-10-04 PubMed ID: 17910268DOI: 10.2746/042516407x183162Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

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This research conducted in Victoria, Australia from 1989 to 2004 aimed to identify risk factors for the fatality of Thoroughbred racehorses in flat races. Factors such as horse gender, previous race history, race length, racing year, racecourse location, and track rating were associated with fatalities.

Methodology

  • The researchers conducted a retrospective study on fatalities in flat horse racing. The definition of a fatality in this study comprised all horses that died either during or directly after a flat race or official flat trial. It also included those that were subjected to euthanasia within 24 hours of an event where an injury was sustained.
  • The study included 283 case starts (occurrences where a fatality occurred) and 3307 control starts (races without fatalities).
  • To identify the risk factors for fatalities at any one start, the scientists used both univariable and multivariable backward stepwise logistic regression.

Results

  • According to the final multivariable model used in the study, several factors were identified as being associated with fatality. These included: horse gender, the horse’s prior racing history, the length of the race, the year of the race, the location of the racecourse, and the track rating.
  • Consistent with their theory, the researchers found that horses which accumulate high-speed exercise are more predisposed to potentially lethal injuries.

Conclusions and Implications

  • Through this study, identifiable risk factors for fatalities in flat horse racing were discovered. These findings could aid in the development of effective strategies to improve safety for both horses and their jockeys in future races.
  • The effects of different track ratings on the incidence of injuries and subsequent fatalities are considered significant enough to warrant further investigation.
  • The results gathered are not only important locally for the safety of the horse racing industry in Victoria, Australia, but can also serve as a valuable reference for other regions as risk factors may differ among regions within a country and between countries.

Cite This Article

APA
Boden LA, Anderson GA, Charles JA, Morgan KL, Morton JM, Parkin TD, Clarke AF, Slocombe RF. (2007). Risk factors for Thoroughbred racehorse fatality in flat starts in Victoria, Australia (1989-2004). Equine Vet J, 39(5), 430-437. https://doi.org/10.2746/042516407x183162

Publication

ISSN: 0425-1644
NlmUniqueID: 0173320
Country: United States
Language: English
Volume: 39
Issue: 5
Pages: 430-437

Researcher Affiliations

Boden, L A
  • Department of Veterinary Science, The University of Melbourne, 250 Princes Highway, Werribee, Victoria 3030, Australia.
Anderson, G A
    Charles, J A
      Morgan, K L
        Morton, J M
          Parkin, T D H
            Clarke, A F
              Slocombe, R F

                MeSH Terms

                • Age Factors
                • Animals
                • Athletic Injuries / epidemiology
                • Athletic Injuries / mortality
                • Athletic Injuries / veterinary
                • Case-Control Studies
                • Cause of Death
                • Female
                • Horses / injuries
                • Incidence
                • Logistic Models
                • Male
                • Multivariate Analysis
                • Odds Ratio
                • Physical Conditioning, Animal / adverse effects
                • Retrospective Studies
                • Risk Factors
                • Running
                • Safety
                • Sports
                • Victoria

                Citations

                This article has been cited 24 times.
                1. Cameron-Whytock HA, O'Brien D, Lewis V, Parkin T, Bennet ED. Equine fatalities in equestrian eventing. Equine Vet J 2025 Sep;57(5):1387-1394.
                  doi: 10.1111/evj.14529pubmed: 40371753google scholar: lookup
                2. Bennet ED, Parkin TDH. Novel risk factors associated with fatal musculoskeletal injury in Thoroughbreds in North American racing (2009-2023). Equine Vet J 2026 Jan;58(1):20-30.
                  doi: 10.1111/evj.14503pubmed: 40134143google scholar: lookup
                3. Allen SE, Taylor S, Given J, Verheyen KL. Risk factors for fatality in jump racing Thoroughbreds in Great Britain (2010-2023). Equine Vet J 2025 Jul;57(4):870-877.
                  doi: 10.1111/evj.14450pubmed: 39665146google scholar: lookup
                4. Ayodele BA, Pagel CN, Mackie EJ, Armour F, Yamada S, Zahra P, Courtman N, Whitton RC, Hitchens PL. Differences in bone turnover markers and injury risks between local and international horses: A Victorian Spring Racing Carnival study. Equine Vet J 2025 Mar;57(2):333-346.
                  doi: 10.1111/evj.14098pubmed: 38634210google scholar: lookup
                5. Wong ASM, Morrice-West AV, Hitchens PL, Whitton RC. The association between Thoroughbred racehorse training practices and musculoskeletal injuries in Victoria, Australia. Front Vet Sci 2023;10:1260554.
                  doi: 10.3389/fvets.2023.1260554pubmed: 37941814google scholar: lookup
                6. Bennet ED, Parkin TDH. Anomalous Incidence of Fatal Musculoskeletal Injury in North American 2-Year-Old Thoroughbred Racehorses in the Year 2020. Animals (Basel) 2023 Aug 9;13(16).
                  doi: 10.3390/ani13162572pubmed: 37627362google scholar: lookup
                7. Gibson MJ, Legg KA, Gee EK, Rogers CW. The Reporting of Racehorse Fatalities in New Zealand Thoroughbred Flat Racing in the 2011/12-2021/22 Seasons. Animals (Basel) 2023 Feb 9;13(4).
                  doi: 10.3390/ani13040612pubmed: 36830402google scholar: lookup
                8. Horan K, Coburn J, Kourdache K, Day P, Carnall H, Brinkley L, Harborne D, Hammond L, Peterson M, Millard S, Pfau T. Hoof Impact and Foot-Off Accelerations in Galloping Thoroughbred Racehorses Trialling Eight Shoe-Surface Combinations. Animals (Basel) 2022 Aug 23;12(17).
                  doi: 10.3390/ani12172161pubmed: 36077882google scholar: lookup
                9. Morrice-West AV, Hitchens PL, Walmsley EA, Tasker K, Lim SL, Smith AD, Whitton RC. Relationship between Thoroughbred workloads in racing and the fatigue life of equine subchondral bone. Sci Rep 2022 Jul 7;12(1):11528.
                  doi: 10.1038/s41598-022-14274-ypubmed: 35798766google scholar: lookup
                10. Hellings IR, Skjerve E, Karlstam E, Valheim M, Ihler CF, Fintl C. Racing-associated fatalities in Norwegian and Swedish harness racehorses: Incidence rates, risk factors, and principal postmortem findings. J Vet Intern Med 2022 Mar;36(2):778-786.
                  doi: 10.1111/jvim.16364pubmed: 35060194google scholar: lookup
                11. Crawford KL, Finnane A, Greer RM, Barnes TS, Phillips CJC, Woldeyohannes SM, Bishop EL, Perkins NR, Ahern BJ. Survival Analysis of Training Methodologies and Other Risk Factors for Musculoskeletal Injury in 2-Year-Old Thoroughbred Racehorses in Queensland, Australia. Front Vet Sci 2021;8:698298.
                  doi: 10.3389/fvets.2021.698298pubmed: 34796223google scholar: lookup
                12. Physick-Sheard P, Avison A, Sears W. Factors Associated with Fatality in Ontario Thoroughbred Racehorses: 2003-2015. Animals (Basel) 2021 Oct 13;11(10).
                  doi: 10.3390/ani11102950pubmed: 34679971google scholar: lookup
                13. Legg KA, Gee EK, Cochrane DJ, Rogers CW. Preliminary Examination of the Biological and Industry Constraints on the Structure and Pattern of Thoroughbred Racing in New Zealand over Thirteen Seasons: 2005/06-2017/18. Animals (Basel) 2021 Sep 27;11(10).
                  doi: 10.3390/ani11102807pubmed: 34679829google scholar: lookup
                14. Shrestha K, Gilkerson JR, Stevenson MA, Flash ML. Drivers of exit and outcomes for Thoroughbred racehorses participating in the 2017-2018 Australian racing season. PLoS One 2021;16(9):e0257581.
                  doi: 10.1371/journal.pone.0257581pubmed: 34547036google scholar: lookup
                15. Crawford KL, Finnane A, Phillips CJC, Greer RM, Woldeyohannes SM, Perkins NR, Kidd LJ, Ahern BJ. The Risk Factors for Musculoskeletal Injuries in Thoroughbred Racehorses in Queensland, Australia: How These Vary for Two-Year-Old and Older Horses and with Type of Injury. Animals (Basel) 2021 Jan 21;11(2).
                  doi: 10.3390/ani11020270pubmed: 33494508google scholar: lookup
                16. Crawford KL, Finnane A, Greer RM, Phillips CJC, Woldeyohannes SM, Perkins NR, Ahern BJ. Appraising the Welfare of Thoroughbred Racehorses in Training in Queensland, Australia: The Incidence, Risk Factors and Outcomes for Horses after Retirement from Racing. Animals (Basel) 2021 Jan 11;11(1).
                  doi: 10.3390/ani11010142pubmed: 33440666google scholar: lookup
                17. Crawford KL, Ahern BJ, Perkins NR, Phillips CJC, Finnane A. The Effect of Combined Training and Racing High-Speed Exercise History on Musculoskeletal Injuries in Thoroughbred Racehorses: A Systematic Review and Meta-Analysis of the Current Literature. Animals (Basel) 2020 Nov 11;10(11).
                  doi: 10.3390/ani10112091pubmed: 33187122google scholar: lookup
                18. Crawford KL, Finnane A, Greer RM, Phillips CJC, Woldeyohannes SM, Perkins NR, Ahern BJ. Appraising the Welfare of Thoroughbred Racehorses in Training in Queensland, Australia: The Incidence and Type of Musculoskeletal Injuries Vary between Two-Year-Old and Older Thoroughbred Racehorses. Animals (Basel) 2020 Nov 5;10(11).
                  doi: 10.3390/ani10112046pubmed: 33167429google scholar: lookup
                19. Hitchens PL, Hill AE, Stover SM. Relationship Between Historical Lameness, Medication Usage, Surgery, and Exercise With Catastrophic Musculoskeletal Injury in Racehorses. Front Vet Sci 2018;5:217.
                  doi: 10.3389/fvets.2018.00217pubmed: 30246014google scholar: lookup
                20. Rosanowski SM, Chang YM, Stirk AJ, Verheyen KLP. Risk factors for race-day fatality in flat racing Thoroughbreds in Great Britain (2000 to 2013). PLoS One 2018;13(3):e0194299.
                  doi: 10.1371/journal.pone.0194299pubmed: 29561898google scholar: lookup
                21. Bolwell C, Rogers C, Gee E, McIlwraith W. Epidemiology of Musculoskeletal Injury during Racing on New Zealand Racetracks 2005-2011. Animals (Basel) 2017 Aug 11;7(8).
                  doi: 10.3390/ani7080062pubmed: 28800064google scholar: lookup
                22. Maeda Y, Hanada M, Oikawa MA. Epidemiology of racing injuries in Thoroughbred racehorses with special reference to bone fractures: Japanese experience from the 1980s to 2000s. J Equine Sci 2016;27(3):81-97.
                  doi: 10.1294/jes.27.81pubmed: 27703403google scholar: lookup
                23. Welsh CE, Lewis TW, Blott SC, Mellor DJ, Lam KH, Stewart BD, Parkin TD. Preliminary genetic analyses of important musculoskeletal conditions of Thoroughbred racehorses in Hong Kong. Vet J 2013 Dec;198(3):611-5.
                  doi: 10.1016/j.tvjl.2013.05.002pubmed: 23746478google scholar: lookup
                24. Vos Nj. Conservative treatment of a comminuted cervical fracture in a racehorse. Ir Vet J 2008 Apr 1;61(4):244-7.
                  doi: 10.1186/2046-0481-61-4-244pubmed: 21851712google scholar: lookup