. Author manuscript; available in PMC: 2013 Jun 12.

Published in final edited form as: J Neural Transm (Vienna). 2011 Jul 24;119(2):253–260. doi: 10.1007/s00702-011-0685-7

Table 1.

Clinical and demographic characteristics of adolescents with major depressive disorder (MDD) and healthy controls

Characteristic	MDD N = 36	Healthy controls N = 20
Age (years)	15.9 ± 1.7	16.1 ± 2.7
Gender (female/male)	21/15 (58/42%)^a	12/8 (60/40%)^a
Ethnicity (Caucasian/African American/Hispanic/Asian/other)	16/5/11/4/0 (44/14/31/11/0%)^a	11/2/1/4/2 (55/10/5/20/10%)^a
Illness history
Duration of Illness (months)	18.8 ± 17.6 (3–84)^b	0
History of suicide attempts	0.6 ± 0.8 (0–3)^b	0
Medication-naïve/medication-free/medicated	20/2/14 (56/6/39%)^a	0
CDRS-R^c	58.4 ± 14.0 (37–97)^b	18.3 ± 2.6 (17–27)^b
BDI-II^d	23.0 ± 10.6 (8–53)^b	1.9 ± 2.8 (0–11)^b
Anhedonia scores	0.578 ± 0.218 (0.083–1.00)^b	0.015 ± 0.036 (0.00–0.014)^b
Current comorbidity
ADHD^e	1 (3%)^a	0
Any anxiety disorder	9 (25%)^a	0
Any comorbidity	10 (28%)^a	0

Respective percentages

Range

Children’s Depression Rating Scale-Revised

Beck Depression Inventory, 2nd edn

Attention Deficit Hyperactivity Disorder