[R] Cochran-Mantel-Haenszel problem

[Arne.Muller@aventis.com]

Hello,

I've tried to analyze some data with a CMH test. My 3 dimensional contingency
tables are 2x2xN where N is usually between 10 and 100.

The problem is that there may be 2 strata with opposite counts (the 2x2
contigency table for these are reversed), producing opposite odds ratios that
cancle out in the overall statistics. These opposite counts are very
important for my analysis, since they account for a dramatic difference.

Could you recommend alternative tests that take account for opposite counts?
Would you suggest a different strategy to analyze such data?

	thanks a lot for your suggestions,

	Arne