Hello,
I am trying to replicate the analysis done in this paper, Table 2 and Table 3.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5332180/pdf/EHP27.pdf
They did an ANOVA of geometric means. I can generate geometric means using proc surveymeans and I'm familiar with proc anova, but I have not done an ANOVA of geometric means. Can anyone point me in the right direction.
Thanks you,
James
Usually it means doing an ANOVA on log-transformed dependent variables. Exp(mean(log(x))) = geomean(x). Thus, if you exponentiate the estimated means on the log scale, you get the geometric means.
Usually it means doing an ANOVA on log-transformed dependent variables. Exp(mean(log(x))) = geomean(x). Thus, if you exponentiate the estimated means on the log scale, you get the geometric means.
Do you know the sas code to do this?
this blog post from dr deng is likely helpful: http://onbiostatistics.blogspot.com/2014/03/analysis-of-2x2x2-crossover-design-data.html
also, see the appendix at this link to understand how it is related to percent change: https://www.cscu.cornell.edu/news/statnews/stnews83.pdf
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