Suppose that I've helped other researchers with the statistical analyses for an epidemiological study and therefore I am acknowledged for that in the "Acknowledgments" section of the paper (something like "We thank andrea for his statistical support").

Obviously, this doesn't count as a publication for me, as I am not one of the authors. But if I include it in my CV, how much "weight" would a professor (or someone within the academia) give to that? I also have other publications where I am either the first author or one of the co-authors.

I am not thinking of a particular situation here (like applying for a grant or for a PhD position). I am just curious to know if it could be useful to put it into my CV or if it would just be irrelevant.