clogit {survival}R Documentation

Conditional logistic regression

Description

Estimates a logistic regression model by maximising the conditional likelihood. Uses a model formula of the form case.status~exposure+strata(matched.set). The default is to use the exact conditional likelihood, a commonly used approximate conditional likelihood is provided for compatibility with older software.

Usage

clogit(formula, data, method=c("exact", "approximate"), na.action=getOption("na.action"), subset=NULL,control=coxph.control())

Arguments

formula Model formula
data data frame
method correct or approximate conditonal likelihood?
na.action missing value handling
subset subset of records to use
control control values

Value

An object of class "clogit", which is a wrapper for a "coxph" object.

Author(s)

Thomas Lumley

See Also

strata,coxph,glm

Examples

clogit(case~spontaneous+induced+strata(stratum),data=infert)
[Package survival version 2.20 Index]