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Logo of gseBioMed CentralBiomed Central Web Sitesearchsubmit a manuscriptregisterthis articleGenetics, Selection, Evolution : GSEJournal Front Page
Genet Sel Evol. 2007; 39(3): 249–265.
Published online 2007 April 14. doi:  10.1186/1297-9686-39-3-249
PMCID: PMC2682825

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


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 mastitis, periodic analysis, sinusoidal analysis, threshold model

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