Genet. Sel. Evol.
Volume 39, Number 3, May-June 2007
|Page(s)||249 - 265|
|Published online||14 April 2007|
A periodic analysis of longitudinal binary responses: a case study of clinical mastitis in Norwegian Red cowsYu-mei Changa, Daniel Gianolaa, b, Bjørg Heringstadb, c and Gunnar Klemetsdalb
a Department of Dairy Science, University of Wisconsin, Madison, USA
b Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences
c Geno Breeding and A. I. Association, Norway
(Received 14 February 2006; accepted 6 December 2006; published online 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.
Key words: clinical mastitis / periodic analysis / sinusoidal analysis / threshold model
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© INRA, EDP Sciences 2007