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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: J Clin Child Adolesc Psychol. 2010 Sep;39(5):650–666. doi: 10.1080/15374416.2010.501287

Table 1. Sample Demographic Characteristics and DSM-IV-TR Diagnoses.

Characteristics Primary Sample
(N = 310)
Subsamples for Logistic Regressions

ADHD-C
(n = 98)
ADHD-IN
(n = 23)
Non-ADHD
(n = 79)
Boys, n (%) 215 (69.4) 63 (64.3) 18 (78.3) 51 (64.6)
Girls, n (%) 95 (30.6) 35 (35.7) 5 (21.7) 28 (35.4)
Mean Age (SD) 8.2 (1.6) 7.9 (1.6) 8.3 (1.5) 8.5 (1.6)
Mean SES (SD)a 5.9 (1.9) 5.5 (1.9) 6.4 (1.6) 6.7 (1.7)
Ethnicity, n (%)
Non-Latino White 185 (59.7) 59 (60.2) 16 (69.6) 53 (67.1)
African American 91 (29.4) 32 (32.7) 4 (17.4) 14 (17.7)
Latino/Hispanic 17 (5.5) 2 (2.0) 2 (2.5) 4 (5.0)
Other or Unknown 17 (5.5) 5 (5.1) 1 (4.3) 8 (10.1)
DSM-IV-TR Diagnoses, n (%)b
ADHD-Combined 106 (34.2) 81 (82.7) 0 0
ADHD-Inattentive 55 (17.7) 17 (17.3) 23 (100) 0
Conduct Disorder 25 (8.1) 15 (15.3) 1 (4.3) 0
Dysthymia or Major Depression 13 (4.2) 6 (6.1) 2 (8.7) 3 (3.8)
Generalized Anxiety Disorder 15 (4.8) 5 (5.1) 2 (8.7) 3 (3.8)
Obsessive Compulsive Disorder 12 (3.9) 3 (3.1) 1 (4.3) 4 (5.1)
Oppositional Defiant Disorder 109 (35.2) 56 (57.1) 7 (30.4) 17 (21.5)
Separation Anxiety 33 (10.6) 10 (10.2) 2 (8.7) 5 (6.3)
Social Phobia/Agoraphobia 14 (4.5) 3 (3.1) 3 (13.0) 4 (5.1)
Specific Phobia 71 (22.9) 24 (24.5) 6 (26.0) 14 (17.7)
Tourette's or Tic Disorder 21 (6.8) 4 (4.1) 1 (4.3) 4 (5.1)
No diagnosis, n (%) 90 (29.0) 0 0 44 (55.7)
One diagnosis, n (%) 90 (29.0) 32 (32.7) 11 (47.8) 23 (29.1)
Two or more diagnoses, n (%) 130 (41.9) 66 (67.7) 12 (52.7) 12 (15.2)

Note: ADHD= Attention Deficit/Hyperactivity Disorder; ADHD-C = ADHD-Combined type; ADHD-IN = ADHD-Inattentive type.

a

Socioeconomic status (SES) scored on an adapted version of Hollingshead's (1975) scale where 1 = lowest and 9 = highest (n = 284).

b

Children with comorbid diagnoses were counted more than once for the different diagnostic categories.