Table 1.

Descriptive statistics on adult sample

	ADHD n = 145	Control n = 201	Total N = 406†
Males n(%)	95(65.5)	85(42.3)	197(48.5)**
Ethnic minority n(%)	16(11)	37(18.5)	53(13)*
Age	24(4.6)	23.9(4.6)	24(4.6)
Income ($)	11867.5(35484.3)	49708(5628.5)	7920.3(24120.6)
IQ	110.8(12.3)	113.2(10.1)	111.9(11)
ADHD-C n(%)	63(43.5)	—	63(15.5)
ADHD-PI n(%)	64(44.1)	—	64(15.8)
ADHD-PHI n(%)	18(12.4)	—	18(4.4)
ASPD n(%)	15(10.3)	8(4)	23(5.7)**
Drug dependence n(%)	8(5.5)	4(2)	12(3)**
MDD n(%)	72(49.7)	53(26.4)	125(30.8)**
GAD n(%)	28(19.3)	10(5)	38(9.4)*
Inattentive Sx	7(1.7)	1.8(2.2)	3.9(3.2)**
Hyperactive Sx	5.6(2.5)	1.7(2)	3.2(2.9)**

Note.

^*p < .05;

^**p < .01, via t-tests or chi-squares.

^†Sixty adults were identified as having situational ADHD or were screened out of the study at a later point in time, but were included in study analyses because they had data on individual symptom items.

ADHD-C= ADHD combined subtype. ADHD-PI = ADHD, predominantly inattentive subtype. ADHD-PHI = ADHD, predominantly hyperactive-impulsive subtype. ASPD = antisocial personality disorder, lifetime. MDD = major depressive disorder, lifetime. GAD = generalized anxiety disorder, lifetime. Sx = symptoms.