Inspection of the profiles for the NCS and NCS-R five-class LCA models (see figures 1, 2, 3, and 4) revealed the following. Class 1, the largest of the five classes, showed extremely low probabilities of diagnosis of any disorder. Class 2 was composed of individuals with modal diagnoses of phobias (all types) and panic disorder (to a lesser extent), in conjunction with depression. Class 3 consisted predominantly of subjects diagnosed with depression in conjunction with dysthymia, and also GAD. Class 4 was distinguished by a high prevalence of externalizing disorders (conduct disorder, alcohol dependence, drug dependence), in conjunction with lesser elevations on certain other disorders including depression. The fifth and final class was composed of subjects who demonstrated high levels of both internalizing (fear, distress) and externalizing (antisocial, substance-related) psychopathology, in addition to bipolar I disorder. Given these disorder profiles, we labeled the five classes as follows: few-disorders, fear, distress, externalizing, and multimorbid.
