survival (version 2.9-6)

clogit: 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)

Arguments

formula

Model formula

data

data frame

method

correct or approximate conditonal likelihood?

na.action

missing value handling

subset

subset of records to use

Value

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

See Also

strata,coxph,glm

Examples

data(infert)
clogit(case~spontaneous+induced+strata(stratum),data=infert)