The present findings should be understood within the context of the potential limitations of the study. It is important to appreciate that the magnitude of the prospective associations was small, raising the question of the importance of the effects we found. And, predictors not included in this study might explain some of the same variance explained by the traits under investigation here. If that proves to be true, the causal relations among overlapping predictors will need to be worked out, in order to understand their different possible roles in the risk process.
