Table 2.

Course and Severity of Lifetime DSM-IV/CIDI Intermittent Explosive Disorder Among 6483 Adolescents in the NCS-A

Characteristic	Mean (SE)			Narrowly Defined vs Broadly Defined–Only ${\chi }_1^2$b
	Narrowly Defineda (n = 327)	Broadly Defined–Onlya (n = 147)	Broadly Defineda (n = 474)
Course
No. of lifetime attacks	22.6 (4.8)	7.2 (2.0)	17.6 (3.1)	8.3c
No. of years with attacks	4.3 (0.3)	3.3 (0.2)	4.0 (0.2)	5.2
Highest No. of annual attacks	24.9 (8.3)	3.1 (0.6)	17.8 (5.2)	6.6c
Severity
Property damage, $d	250.5 (75.8)	97.5 (13.9)	208.9 (56.4)	3.8
Medical attention required (per 100 cases)e	64.1 (25.4)	20.1 (9.5)	52.5 (18.9)	2.7

Abbreviations: CIDI, Composite International Diagnostic Interview; NCS-A, National Comorbidity Survey Replication Adolescent Supplement.

^aNarrowly defined, 3 or more annual attacks in at least 1 year, including physical assault or property damage; broadly defined–only, 3 or more lifetime attacks either without ever having as many as 3 attacks in a single year or having 3 or more annual attacks in at least 1 year but the attacks involved only threatening someone; broadly defined (includes all intermittent explosive disorder cases), narrowly defined or broadly defined–only.

^bSignificance test with bivariate linear regression models to test the difference in mean between narrowly defined and broadly defined–only cases. No controls were used.

^cSignificant difference in means at P < .05, 2-sided test.

^dEstimated cost of all property ever damaged or broken in an anger attack.

^eNumber of times during an anger attack that someone was hurt enough to need medical attention per 100 cases of intermittent explosive disorder.