Epidemiology

Authors: MA Jackson, AL Vizard, GA Anderson, AF Clarke, RC Whitton
Journal: Australian Veterinary Journal

Objectives Describe the association between the purchase price of Thoroughbred yearlings sold in Australia and racing performance as 2- and 3-year-olds.

Methods Race performance data of 2773 Thoroughbred yearlings sold at auction during 2003 were collected. Associations between purchase price and the probability of starting, the number of race starts and the prize money earned were examined.

Category: Epidemiology - Equine
Authors: PK Knight, PC Thomson
Journal: Australian Veterinary Journal

Objective Compare the career profiles of a cohort of Standardbred horses that first raced as 2-year-olds with those that started their racing careers at a later age. Method Retrospective analysis of the racing records of all foals born in New South Wales in the 2000 foaling season. Results The career records of 999 horses were analysed. Almost half (43.9%) first raced as 2-year-olds and one-third (33.9%) as 3-year-olds.

Category: Epidemiology - Equine
Authors: G. D. TROPE, G. A. ANDERSON, R. C. WHITTON
Journal: Equine Veterinary Journal

Reasons for performing study: The effect of palmar osteochondral disease lesions on performance of Thoroughbred (TB) racehorses is unclear. There is a need to describe patterns of radiopharmaceutical uptake (IRU) in fetlock joints of TB racehorses and to evaluate post scintigraphy performance.

Hypotheses: IRU in the metacarpal (MC) and metatarsal (MT) condyles is more common than IRU in the parasagittal grooves and is associated with poorer post diagnosis performance than controls.

Authors: G. D. TROPE, G. A. ANDERSON, R. C. WHITTON
Journal: Equine Veterinary Journal

Reasons for performing study: The effect of palmar osteochondral disease lesions on performance of Thoroughbred (TB) racehorses is unclear. There is a need to describe patterns of radiopharmaceutical uptake (IRU) in fetlock joints of TB racehorses and to evaluate post scintigraphy performance.

Hypotheses: IRU in the metacarpal (MC) and metatarsal (MT) condyles is more common than IRU in the parasagittal grooves and is associated with poorer post diagnosis performance than controls.

Authors: Peter H.L. Ramzan, Lorraine Palmer
Journal: The Veterinary Journal

Musculoskeletal injury is the most common cause of lost training days in the young Thoroughbred horse in flat race training. To date, there has been little investigation of the regional patterns of injury frequently observed by clinicians in racehorse practice. The present study was conducted to determine incidence of musculoskeletal injuries in Thoroughbreds in training in Newmarket, United Kingdom. Veterinary records for all horses resident in three large (>100 horse) training yards were assessed for occurrence of significant musculoskeletal injury.

Authors: Richelle H. Neundorf, MSc; Mark B. Lowerison, BSc; Antonio M. Cruz, DVM, MVM, MSc, DrMedVet; Jeff J. Thomason, PhD; Beverley J. McEwen, DVM, PhD; Mark B. Hurtig, DVM, MVSc
Journal: American Journal of Veterinary Research

Objective—To determine the prevalence and severity of osteoarthritis in the metacarpophalangeal joints of Thoroughbred racehorses via development and validation of a quantitative macroscopic evaluation system. Sample Population—Metacarpophalangeal joints from 50 Thoroughbred racehorses. Procedures—Joints were collected from horses that died or were euthanized within 60 days of racing. Metacarpophalangeal joints were assessed for osteoarthritic degeneration by use of macroscopic and histologic scoring systems, polarized light microscopy, and cartilage biochemical analysis.

Authors: M. M. SLOET van OLDRUITENBORGH-OOSTERBAAN, W. GENZEL, P. R. Van WEEREN
Journal: Equine Veterinary Journal

Reasons for performing study: Welfare concerns over the reasons for interruption or termination of a sporting career in horses have been expressed.

Objectives: To study the career of competition horses and factors that influence career length.

Category: Epidemiology - Equine
Authors: J. CHEETHAM, A. S. RIORDAN, H. O. MOHAMMED † , C. W. McILWRAITH ‡ and L. A. FORTIER
Journal: Equine Veterinary Journal

Reasons for performing study: There is no consensus on objective outcome measures that can be used to determine if a medical or surgical treatment affects race performance.

Objective: To determine the association between 2 commonly used outcome measures (total starts and total earnings) and age, sex, gait and race surface.

Category: Epidemiology - Equine
Authors: B. O'MEARA* †‡ , B. BLADON ‡ , T. D. H. PARKIN † , B. FRASER § and C. J. LISCHER †
Journal: Equine Veterinary Journal

Reasons for performing study: There is limited information regarding the number of races and the period for evaluation of outcome which is critical for assessment of SDF tendonitis treatments.

Objective: To evaluate the re-injury rate and racing performance of Thoroughbred racehorses that sustain SDF tendonitis in relation to matched controls in terms of number of races post treatment and maximum racing performance ratings before and after injury.

Category: Epidemiology - Equine - Tendon
Authors: K. L. HESSE* and K. L. P. VERHEYEN †
Journal: Equine Veterinary Journal

Reasons for performing study: Physiotherapists who work in racehorse training yards routinely treat horses' backs and hindquarters and may be able to recognise signs that indicate the presence of (impending) pelvic or hindlimb fracture before it becomes catastrophic.

Objective: To establish whether physiotherapy assessment findings in Thoroughbred racehorses referred for routine physiotherapy could be predictive of subsequent (within 30 days) pelvic or hindlimb fracture diagnosis.

Category: Epidemiology - Equine