[R] Suitable test for ordinal variable vs continuous variable trend

Daniel Brewer Daniel.Brewer at icr.ac.uk
Thu Dec 2 15:17:04 CET 2010

Dear all,

For a population of about 200 I have a continuous variable and an ordinal variable.  The question I would like to ask is whether the continuously increases (or decreases) as the rank of the ordinal variable increases.  I was thinking that a Spearmen's rank correlation or or a chi squared trend might be appropriate.  I don't have any experience dealing with ordinal variables so I am at a bit of a loss.  What is the most appropriate test? and is it implemented in R?

Many thanks


Daniel Brewer

Institute of Cancer Research
Molecular Carcinogenesis
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United Kingdom 

Tel: +44 (0) 20 8722 4109
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Email: daniel.brewer at icr.ac.uk 


The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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