Package: UdderQuarterInfectionData
Type: Package
Title: Udder Quarter Infection Data
Version: 1.0.0
Date: 2017-09-06
Author: Hans Laevens, Luc Duchateau, Klara Goethals, Ewoud De Troyer and Paul Janssen
Maintainer: Luc Duchateau <Luc.Duchateau@ugent.be>
Description: The udder quarter infection data set contains infection times of individual cow udder quarters with Corynebacterium bovis (Laevens et al. 1997 <DOI:10.3168/jds.S0022-0302(97)76295-7>). Obviously, the four udder quarters are clustered within a cow, and udder quarters are sampled only approximately monthly, generating interval-censored data. The data set contains both covariates that change within a cow (e.g., front and rear udder quarters) and covariates that change between cows (e.g., parity [the number of previous calvings]). The correlation between udder infection times within a cow also is of interest, because this is a measure of the infectivity of the agent causing the disease. Various models have been applied to address the problem of interdependence for right-censored event times. These models, as applied to this data set, can be found back in the publications found in the reference list.
License: GPL-3
Encoding: UTF-8
LazyData: true
RoxygenNote: 6.0.1
Imports: stats, utils
NeedsCompilation: no
Packaged: 2017-09-06 14:44:15 UTC; lucp8394
Repository: CRAN
Date/Publication: 2017-09-06 15:53:42 UTC
Built: R 4.6.0; ; 2026-04-25 22:59:12 UTC; unix
