Sure, the correlation is statistically significant. Without a control to infer causality the results become much less interesting.<p>To infer causality in an epidemiological study such as this you need very large cohorts with very specific results.<p>Even with huge cohorts you still have relatively indefensible results. The 7 country study is a good example: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Seven_Countries_Study" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Seven_Countries_Study</a>