Table 3.

Comparison of initial self-reported clinical characteristics and laboratory-measured impulsivity of adolescents with self-injurious behaviors only (NSSI-Only) or self-injurious behavior with suicide attempt(s) (NSSI+SA)

	Group
	NSSI-Only (n = 31)		NSSI+SA (n = 25)		Analyses
Self-Report Measures	Mean	SD	Mean	SD	F	df	p	Observed Power*	Cohen's d
Beck Depression Inventory	14.6	11.7	22.3	9.5	7.04	1,54	.010	.74	0.72
Beck Hopelessness Scale	4.3	4.3	6.9	4.7	4.22	1,54	.045	.52	0.55
Beck Scale for Suicidal Ideation	2.8	5.1	10.9	10.8	13.70	1,54	.001	.95	0.96
Barratt Impulsiveness Scale	72.9	12.5	80.6	6.5	7.68	1,53	.008	.78	0.77
Lifetime History of Aggression	19.7	8.5	22.4	7.0	1.70	1,54	.327	.25	0.35
Laboratory Behavioral Impulsivity
TCIP % Smaller-Sooner Choices	26.5	23.9	43.0	29.0	5.47	1,54	.023	.63	0.62
GoStop 150 msec % Disinhibited	26.3	14.9	35.4	23.3	3.13	1,54	.082	.41	0.46

^*Computed using alpha = .05

GoStop = GoStop Impulsivity Paradigm; TCIP = Two Choice Impulsivity Paradigm