poTest

0th

Percentile

Test for Proportional Odds in the Proportional-Odds Logistic-Regression Model

The poTest function implements tests proposed by Brant (1990) for proportional odds for logistic models fit by the polr function in the MASS package.

Keywords
models, htest
Usage
poTest(model, ...)
# S3 method for polr
poTest(model, ...)
# S3 method for poTest
print(x, digits=3, ...)
Arguments
model

a proptional-odds logit model fit by polr.

x

an object produced by poTest.

digits

number of significant digits to print.

ignored.

Value

poTest returns an object meant to be printed showing the results of the tests.

References

R. Brant, "Assessing proportionality in the proportional odds model for ordinal logistic regression." Biometrics 46: 1171--1178, 1990.

Aliases
  • poTest
  • poTest.polr
  • print.poTest
Examples
# NOT RUN {
if (require("MASS")){
    .W <- Womenlf
    .W$partic <- factor(.W$partic, levels=c("not.work", "parttime", "fulltime"))
    poTest(polr(partic ~ hincome + children + region, data=.W))
}
# }
Documentation reproduced from package car, version 3.0-0, License: GPL (>= 2)

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