An interesting feature of our results pertains to the multimorbid class in the current study, which exhibited high rates of all relatively common disorders utilized in the LCA models, as well as bipolar I disorder. These results fit with data indicating that bipolar I disorder shows substantial comorbidity with internalizing and externalizing disorders of differing types [8, 9]. However, what is particularly noteworthy about this class is that it suggests that the presence of high levels of internalizing and externalizing psychopathology appears to be associated with more than just either.
