title: Profiling the careers of Thoroughbred horses racing in Australia between 2000 and 2010.
abstract: BACKGROUND
  Research investigating trends in racehorse careers require a benchmark for accurate comparison. Currently little whole population data exists for horses racing in Australia.
  
  
  OBJECTIVE
  To determine the range and variation in career length and number of career starts for horses racing in Australia. To document and provide evidence regarding the current differences between the sexes for career length and careers starts.
  
  
  METHODS
  Racing data were collected for Thoroughbreds over a 10-year period. Career length, number of career starts and spells per year were evaluated. Statistical analyses were performed using the statistical package R.
  
  
  RESULTS
  A total of 2,782,774 performance records yielded career information for 164,046 horses. Median career length and number of career starts for the population were 14.7 months and 10 starts, respectively. Significant differences (P<0.001) were present between the sexes for all career outcomes. Between 2000 and 2010, the percentage of Thoroughbreds racing in Australia with careers longer than 12, 24, 36 and 48 months was 56.65, 32.35, 16.66 and 7.74, respectively.
  
  
  CONCLUSIONS
  Clear differences in career outcomes exist between intact males, females and geldings racing in Australia. Future research should be conscious of these differences when analysing population data.
authors.affiliation: Faculty of Veterinary Science, University of Sydney, Camperdown, Sydney, New South Wales, Australia. brandon.velie@sydney.edu
authors.forename: B D
authors.initials: BD
authors.lastname: Velie
authors.forename: C M
authors.initials: CM
authors.lastname: Wade
authors.forename: N A
authors.initials: NA
authors.lastname: Hamilton
mesh_terms: D000375:Aging; D000818:Animals; D001315:Australia; D005260:Female; D006736:Horses; D008297:Male; D010805:Physical Conditioning, Animal / Q000502:physiology; D012420:Running / Q000706:statistics & numerical data*; D013177:Sports / Q000706:statistics & numerical data*