Ordinal logistic regression

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An ordinal logistic regression model is used to analyze the effect of predictors on an ordinal categorical outcome measure. The outcome measure therefore consists of (more than two) categories that have a logical ordering. For example, if the result of a test is scored as 'normal', 'mildly abnormal' or 'abnormal'.

Where do I find ordinal logistic regression in SPSS?

You will find ordinal logistic regression in SPSS under Analyze -> Regression -> Ordinal. See, for example, this annotated output from UCLA for an explanation of how to interpret the output of this procedure.

How do I perform ordinal logistic regression in R?

In R you can, for example, use the function 'lrm' in the package 'Design' to perform a multinomial logistic regression.

References

• UCLA explanation of ordinal logistic regression in R.

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