Hi, this is a statistical question rather than a pure R question. I have got many help from R mailing list in the past, so would like to try here and appreciate any input:

I conducted Mantel-Haenszel test to show that the performance of a diagnostic test did not show heterogeneity among 4 study sites, i.e. Mantel Haenszel test p value > 0.05,  so that I could conduct a meta-analysis by combining data of all 4 study sites. 

Now one of the reviewers for the manuscript did a powering analysis for Mantel Haneszel test showing that with the sample sizes I have, the power for Mantel Haeszel test was only 50%. So he argued that I did not have enough power for Mantel Haenszel test.

My usage of Mantel Haenszel was NOT to show a significant p value, instead a non-sginificant p value was what I was looking for because non-significant p value indicate NO heterogeneity among study sites. Powering analysis in general is to show whether you have enough sample size to ensure a statistical significant difference can be seen with certain likelihood. But this is not how I used Mantel Haenszel test. So I think in my scenario, the power analysis is NOT applicable because I am simply using the test to demonstrate a non-significant p value.

Am I correct on this view?

Thanks and appreciate any thoughts.

John
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