Hi,

I want to know if a W value of 1 in the ANCOM results is significant. I don´t know what is the “minimum” value of W that I can take as significant.

Thanks

Hi,

I want to know if a W value of 1 in the ANCOM results is significant. I don´t know what is the “minimum” value of W that I can take as significant.

Thanks

Hey @Jibda,

See this post by @mortonjt for more info about `W`

.

In short, a `1`

is not a good result, only `0`

could be worse. `W`

is a count of tests that “succeed”, so it’s not a proportion like you might hope.

Sorry, but hope that helps!

1 Like

Thanks: slight_smile :. I always appreciate your quick response. I have read about other issues about 0 values but I have troubles understanding what minimal W value can I take as meaningful. Can you help me with this?

1 Like

Hey @Jibda,

Since the maximum `W`

value depends on the number of features being compared, the “minimum” `W`

value doesn’t quite exist either.

What you are mostly looking for is a natural break in the `W`

values which is what the volcano plot tries to show. For example, in this plot there’s two obvious points which separate far from the rest. But there’s still nothing like a “p-value” to demonstrate that those really are significant, they are just most dissimilar from the other `W`

values.

This topic was automatically closed 31 days after the last reply. New replies are no longer allowed.