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Vet J. 2018 May;235:42-46. doi: 10.1016/j.tvjl.2018.03.003. Epub 2018 Mar 14.

A retrospective cohort study investigating risk factors for the failure of Thoroughbred racehorses to return to racing after superficial digital flexor tendon injury.

Author information

1
Clinical Veterinary Medicine Division, Equine Research Institute, Japan Racing Association, Shiba 1400-4, Shimotsuke, Tochigi 329-0412, Japan.
2
Race Horse Hospital, Miho Training Centre, Japan Racing Association, Mikoma 2500-2, Miho, Ibaraki 300-0493, Japan.
3
Clinical Veterinary Medicine Division, Equine Research Institute, Japan Racing Association, Shiba 1400-4, Shimotsuke, Tochigi 329-0412, Japan. Electronic address: kasashima@equinst.go.jp.

Abstract

A retrospective cohort study was conducted to investigate risk factors for the failure of Thoroughbred racehorses to return to racing after an injury of the superficial digital flexor tendon (SDFT). Successful return was defined as the completion of five or more races after SDFT injury. The official Japan Racing Association (JRA) medical records of racehorses with a core-type SDFT injury were reviewed for clinical variables related to the characteristics of the horse and the severity of SDFT injuries at the time of diagnosis. Data on racing outcomes were obtained from the official JRA racing database. Risk factors were screened using univariable logistic regression and subsequent multivariable model building. Forty-nine of 346 (14.2%) horses successfully returned to racing after SDFT injuries. Multivariable model building revealed that an increase in the total number of injured zones (defined as the total number of zones in which the injured hypoechoic area was observed at the time of ultrasonographic diagnosis of SDFT injury) was associated with an increased risk of failure to return to racing after SDFT injury. Horse characteristics, such as age, body mass and sex, were not associated with a successful return to racing. In the rehabilitation of cases with larger (longer) lesions, more effective and careful medical management may be needed for an improvement in the athletic outcomes.

KEYWORDS:

Equine; Injury; Outcome; Return to racing; Superficial digital flexor tendon

PMID:
29704937
DOI:
10.1016/j.tvjl.2018.03.003
[Indexed for MEDLINE]

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