Our study used the categorical approach of DSM-IV-TR, which has intrinsic limitations (e.g., Brown & Barlow, 2002). We also combined current and past diagnoses to form diagnostic categories. This approach was the most practical, because in our sample, the rate of some current disorders was much lower than lifetime rates (e.g., current prevalence of mood disorders was only 6.6%). However, it remains possible that the structure of mood and anxiety disorders might be different for a study examining only current diagnoses.
