Dear all,
I know how to test for trend in a contingency table, but how do I test for
trend for odds ratios?
I came across papers on test for trend in odds ratios of logistic regression
(e.g. ordinal independent variable in the logistic regression on income
group, age groups). What is the formula for it? Are there any references
that I can read on? Also, any statistical software for test of trend for
odds ratios (e.g. Splus, SAS, SPSS) that I can make use of?
Thanks very much & best regards.
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