Free Access
| Issue |
Genet. Sel. Evol.
Volume 39, Number 3, May-June 2007
|
|
|---|---|---|
| Page(s) | 249 - 265 | |
| DOI | https://doi.org/10.1051/gse:2007002 | |
| Published online | 14 April 2007 | |
Genet. Sel. Evol. 39 (2007) 249-265
DOI: 10.1051/gse:2007002
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)
Key words: clinical mastitis / periodic analysis / sinusoidal analysis / threshold model
Correspondence and reprints: y.chang@leeds.ac.uk
© INRA, EDP Sciences 2007
DOI: 10.1051/gse:2007002
A periodic analysis of longitudinal binary responses: a case study of clinical mastitis in Norwegian Red cows
Yu-mei Changa, Daniel Gianolaa, b, Bjørg Heringstadb, c and Gunnar Klemetsdalba 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
Correspondence and reprints: y.chang@leeds.ac.uk
© INRA, EDP Sciences 2007