Conducted a prospective longitudinal study to investigate whether anxiety, depressive, personality, or substance abuse disorders increase risk for onset of bulimia nervosa (BN) or binge eating disorder (BED) during adolescence. Findings for 201 adolescents suggest that adolescents with chronic depressive symptoms may be at elevated risk for the development of BN or BED, and that those with eating disorders may be at elevated risk for the development of depressive disorders. (SLD)