Though the SSAGA was developed prior to the publication of the DSM-IV criteria, all criteria symptoms for the DSM-IV diagnosis were queried, as well as times of onset and remission of symptoms (19). Comparison subjects were interviewed in the same format at baseline (wave I, re-evaluation wave II after 5 years). Only original probands or comparison subjects, their first-degree relatives, and offspring age ≤20 years in the participating families were eligible for follow-up. Of eligible subjects, the follow-up rate was 60% in probands, 65% in family members, and 78% in controls (19).
