https://github.com/cran/Epi
Tip revision: 731faac00ddab070f18308f8f256bad4ce2389eb authored by Bendix Carstensen on 11 January 2011, 00:00:00 UTC
version 1.1.33
version 1.1.33
Tip revision: 731faac
fit.add.Rd
\name{fit.add}
\alias{fit.add}
\title{
Fit an addive excess risk model to interval censored data.
}
\description{
Utility function.
The model fitted assumes a piecewise constant intensity for the
baseline, and that the covariates act additively on the rate scale.
}
\usage{
fit.add( y, rates.frame, cov.frame, start )
}
\arguments{
\item{y}{Binary vector of outcomes}
\item{rates.frame}{Dataframe expanded from the original data by
\code{\link{expand.data}}, cooresponding to covariates for the rate
parameters.}
\item{cov.frame}{ do., but covariates corresponding to the
\code{formula} argument of \code{\link{Icens}}}
\item{start}{Starting values for the rate parameters. If not supplied,
then starting values are generated.}
}
\value{
A list with one component:
\item{rates}{A glm object from a binomial model with log-link function.}
}
\references{
B Carstensen: Regression models for interval censored
survival data: application to HIV infection in Danish homosexual
men. Statistics in Medicine, 15(20):2177-2189, 1996.
CP Farrington: Interval censored survival data: a generalized linear
modelling approach. Statistics in Medicine, 15(3):283-292, 1996.
}
\author{
Martyn Plummer, \email{plummer@iarc.fr}
}
\seealso{
\code{\link{Icens}}
\code{\link{fit.mult}}
}
\examples{
data( HIV.dk )
}
\keyword{ models }
\keyword{ regression }
\keyword{ survival }