Clinical Risk State for Bipolar Disorder in Adolescents

Aim: The purpose of the study is to characterize the at-risk phases preceding a first episode of bipolar disorder and of schizophrenia, and to identify clinical and biological predictors of the disease development. Hypothesis a: Over 6-24 months, 25% of at-risk youth will develop the full manifestations of Bipolar Disorder (BPD) or schizophrenia. Hypothesis b: The symptoms utilized for characterizing the at-risk phase of BPD will differentiate between individuals developing BPD and schizophrenia.