common causes of the two variables. It remains for future research to determine what those common causes might be, but it seems likely based on the current results that smoking is not itself of causal importance in this regard, at least in predicting SROs. It is important to reiterate the caution in the introduction, though, that the same results might not hold in predicting suicide deaths, as only a small fraction of the people who have SROs go on to complete suicides and the predictive associations of smoking with suicide deaths might go through different causal pathways than those involving SROs.
