Analysis of the relationship between type traits and functional survival in Canadian Holsteins using a Weibull proportional hazards model.

@article{Sewalem2004AnalysisOT,
  title={Analysis of the relationship between type traits and functional survival in Canadian Holsteins using a Weibull proportional hazards model.},
  author={Asheber Sewalem and G. J. Kistemaker and Filippo Miglior and Brian Van Doormaal},
  journal={Journal of dairy science},
  year={2004},
  volume={87 11},
  pages={
          3938-46
        }
}
The aim of this study was to explore the impact of type traits on the functional survival of Canadian Holstein cows using a Weibull proportional hazards model. The data set consisted of 1,130,616 registered cows from 13,606 herds calving from 1985 to 2003. Functional survival was defined as the number of days from first calving to culling, death, or censoring. Type information consisted of phenotypic type scores for 8 composite traits (with 18 classes of each) and 23 linear descriptive traits… CONTINUE READING
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