[rdmcfee]

Sure, the correlation is statistically significant. Without a control to infer causality the results become much less interesting.

To infer causality in an epidemiological study such as this you need very large cohorts with very specific results.

Even with huge cohorts you still have relatively indefensible results. The 7 country study is a good example: https://en.wikipedia.org/wiki/Seven_Countries_Study

[moultano]

Particularly since one of the connections they postulate is between antibiotics and asthma, I'm curious how they control for respiratory infections which seems like a much more likely common cause.