Document Detail


Validation of a regression model for standardizing lifetime racing performances of thoroughbreds.
MedLine Citation:
PMID:  9170095     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: To determine the relationship between prediction errors of a regression model of racing finish times and earnings or finish position; the relationship between standardized finish times, determined by use of this model, and earnings or finish position; and whether this model was valid when applied to data for horses that underwent surgical treatment. DESIGN: Survey. SAMPLE POPULATION: Records of 6,700 healthy Thoroughbreds racing in Louisiana and of 31 Thoroughbreds with idiopathic left laryngeal hemiplegia that underwent surgical treatment. PROCEDURE: Predicted and standardized finish times were calculated by use of the regression model for healthy horses, and the relationships between prediction error (actual--predicted finish time) and standardized finish times, and earnings and finish position, were examined. Then, the regression model was applied to data for horses with hemiplegia to determine whether the model was valid when used to calculate predicted and standardized finish times for lifetime performance data. RESULTS: Prediction error and standardized finish times were negatively correlated with earnings and positively correlated with finish position and, thus, appeared to be reliable measures of racing performance. The regression model was found to be valid when applied to lifetime performance records of horses with laryngeal hemiplegia. CLINICAL IMPLICATIONS: Prediction error and standardized finish times are measures of racing performance that can be used to compare performances among Thoroughbred racehorses across a variety of circumstances that would otherwise confound comparison.
Authors:
G S Martin; E Strand; M T Kearney
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American Veterinary Medical Association     Volume:  210     ISSN:  0003-1488     ISO Abbreviation:  J. Am. Vet. Med. Assoc.     Publication Date:  1997 Jun 
Date Detail:
Created Date:  1997-10-02     Completed Date:  1997-10-02     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7503067     Medline TA:  J Am Vet Med Assoc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1641-5     Citation Subset:  IM    
Affiliation:
Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge 70803, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Breeding
Horses / physiology*
Physical Conditioning, Animal / economics,  physiology*
Records as Topic / veterinary
Regression Analysis
Retrospective Studies
Running / economics,  physiology
Sports* / economics

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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