as incremental predictive effects of individual disorders decrease with number of other disorders. To the extent that primary disorders are causes, treatment of the entire cluster of comorbid disorders is likely to be more effective than treatment of individual primary disorders in secondary prevention among patients with comorbidity (Moses & Barlow, 2006). Perhaps even more important, though, is that we showed that the innovative methodology used here yields substantively plausible results. Although many of these results do little more than replicate previous findings, the methodology has the potential to yield much more nuanced results when applied, as we hope it will be in the future, to prospective datasets.
