Is it possible to get the multiple comparison adjustment in pairwise.prop.test() to use less than the full number of comparisons? For example, if I only care about 4 vs 1,2,3 (3 comparisons) below, I would multiply the p-values in the bottom row by 3 instead of 6 (which is the full number of pairwise comparisons) to do the Bonferroni adjustment. p.adjust has the n argument, but I can't figure out how to pass it through by doing something like
pairwise.prop.test(x=b$s,n=b$pop,p.adjust.method="bonferroni", p.adjust.n = 3, alternative="two.sided", correct = FALSE)
With Bonferroni, it's trivial, but much more involved with the other types of corrections.
Here's the result (with code below):
> b <- data.frame(
+ s=c(18,53,49,30),
+ pop=c(29,100,88,73),
+ reg=c("1","2","3","4")
+ )
> pairwise.prop.test(x=b$s,n=b$pop,p.adjust.method="none",alternative="two.sided", correct = FALSE)
Pairwise comparisons using Pairwise comparison of proportions
data: b$s out of b$pop
1 2 3
2 0.387 - -
3 0.547 0.713 -
4 0.056 0.122 0.065
P value adjustment method: none
> pairwise.prop.test(x=b$s,n=b$pop,p.adjust.method="bonferroni", alternative="two.sided", correct = FALSE)
Pairwise comparisons using Pairwise comparison of proportions
data: b$s out of b$pop
1 2 3
2 1.00 - -
3 1.00 1.00 -
4 0.33 0.73 0.39
P value adjustment method: bonferroni
Code:
b <- data.frame(
s=c(18,53,49,30),
pop=c(29,100,88,73),
reg=c("1","2","3","4")
)
pairwise.prop.test(x=b$s,n=b$pop,p.adjust.method="none",alternative="two.sided", correct = FALSE)
pairwise.prop.test(x=b$s,n=b$pop,p.adjust.method="bonferroni", alternative="two.sided", correct = FALSE)