Statistics Colloquium/Research Proposal
November 10 Friday, 11 a.m.
Alavi Commons Room, 6625 Everett Tower

Testing for Association in Stratified 2×2 Contingency Tables

Eunice Ampah
PhD student, Department of Statistics
Western Michigan University

In epidemiology and medical research, data is often summarized in a 2×2 contingency table. The table represents cross-classification between disease outcome and exposure to a risk factor. In the presence of confounders, the tables are stratified according to values of the confounding variable, and association is tested using the Cochran-Mantel-Haenszel statistic.

We propose a testing procedure based on log-odds ratios as an alternative or supplement to the CMH statistic when investigating association across strata. Performance of the proposed test is compared to the CMH statistic under various null and alternative distributional patterns by evaluating size and power thorugh a simulation study. We examine conditions under which the proposed test outperforms the CMH statistic.
All statistics graduate students are expected to attend.


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Department of Statistics
3304 Everett Tower
Western Michigan University
Kalamazoo MI 49008-5152 USA
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