eform {biostat3}

Calculate the exponential form for coefficients and their confidence intervals using either profile likelihood-based or Wald-based confidence intervals.

Description

irr and or use eform with a different name for the estimator.

Usage

eform(object, ...)
## Default S3 method:
eform(object, parm, level = 0.95, method =
c("Delta","Profile"), name = "exp(beta)", ...)
irr(..., name = "IRR")
or(..., name = "OR")

Arguments

object

A fitted model object with coef and confint methods

parm

a specification of which parameters are to be given confidence intervals, either a vector of numbers or a vector of names. If missing, all parameters are considered.

level

the confidence level required

method

string to determine method to use the delta method (stats::confint.default), which assumes that the parameters are asymptotically normal, or profile likelihood-based confidence intervals (MASS:::confint.gllm), respectively.

name

name of the estimator.

...

arguments to pass from irr or or to eform.

Value

A matrix (or vector) with columns giving lower and upper confidence limits for each parameter. These will be labelled as (1-level)/2 and 1 - (1-level)/2 in

Examples

## from example(glm)
counts <- c(18,17,15,20,10,20,25,13,12)
outcome <- gl(3, 1, 9); treatment <- gl(3, 3)
glm.D93 <- glm(counts ~ outcome + treatment, family = poisson())
eform(glm.D93) 
eform(glm.D93, method="Profile")