Table 1  Demographic and clinical characteristics of adolescents with major depressive disorder (MDD) and healthy controls.   a Respective percentages (may not add up to 100% due to rounding). b Children’s depression rating scale – revised. c Beck depression inventory, 2nd ed. d Beck scale for suicidal ideation. e Multidimensional anxiety scale for children. f Attention deficit hyperactivity disorder. g Generalized anxiety disorder.