Open Access

A periodic analysis of longitudinal binary responses: a case study of clinical mastitis in Norwegian Red cows

  • Yu-mei Chang1Email author,
  • Daniel Gianola1, 2,
  • Bjørg Heringstad2, 3 and
  • Gunnar Klemetsdal2
Genetics Selection Evolution200739:249

https://doi.org/10.1186/1297-9686-39-3-249

Received: 14 February 2006

Accepted: 6 December 2006

Published: 14 April 2007

Abstract

A Bayesian procedure for analyzing longitudinal binary responses using a periodic cosine function was developed. It was assumed that, after adjustment for "seasonal" effects, the oscillation of the underlying latent variables for longitudinal binary responses was a stationary series. Based on this assumption, a single dimension sinusoidal analysis of longitudinal binary responses using the Gibbs sampling and Metropolis algorithms was implemented in a study of clinical mastitis records of Norwegian Red cows taken over five lactations.

Keywords

clinical mastitisperiodic analysissinusoidal analysisthreshold model

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Authors’ Affiliations

(1)
Department of Dairy Science, University of Wisconsin
(2)
Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences
(3)
Geno Breeding and A. I. Association

Copyright

© INRA, EDP Sciences 2007

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