Table 1.
Characteristics of Adolescent Suicide Attempters and Never-Suicidal Comparison Subjects
| Characteristic | Suicide attempters (n=40) | Comparison subjects (n=40) | Analysis | ||||
|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Statistica | df | p Value | |
| IQ | 97.3 | 14.7 | 98.3 | 13.8 | t=-0.30 | 39 | 0.77 |
| BPAQ-SF hostility score | 7.1 | 3.8 | 4.8 | 3.4 | t=2.67 | 36 | 0.01 |
| BIS-A total score | 74.4 | 11.6 | 68.6 | 10.5 | t=2.67 | 39 | 0.01 |
| DDQ: Log-10 transformed AUC | −0.57 | 0.31 | −0.62 | 0.37 | t=0.53 | 39 | 0.60 |
| PSAP: Square root transformed aggressive responding per provocation | 7.17 | 3.92 | 6.80 | 3.87 | t=0.40 | 39 | 0.69 |
| n | % | n | % | ||||
|---|---|---|---|---|---|---|---|
| Race/ethnicityb | |||||||
| White, non-Hispanic | 28 | 70.0 | 28 | 70.0 | |||
| Other race, ethnicity | 12 | 30.0 | 12 | 30.0 | |||
| CBCL DSM-oriented scales | |||||||
| Affective disorders | 28 | 70.0 | 16 | 40.0 | χ2=6.6 | 1 | 0.01 |
| Current medication use | |||||||
| Any psychotropic medication use | 30 | 75.0 | 13 | 32.5 | χ2=13.8 | 1 | <0.001 |
| Family history of suicidal behavior,c % yes | 13 | 32.5 | 10 | 25.0 | χ2=0.8 | 1 | 0.37 |
a
Paired t test or McNemar's χ2.
b
Comparison subjects were matched to suicide attempters on race/ethnicity.
c
First-degree relatives.
IQ, intelligence quotient: BPAQ-SF, Buss–Perry Aggression Questionnaire—Short Form; BIS-A, Barratt Impulsivity Scale—Adolescent version; DDQ, Question-Based Delay Discounting Measure; AUC, area under the curve; PSAP, Point Subtraction Aggression Paradigm; CBCL, Child Behavior Checklist; DSM, Diagnostic and Statistical Manual of Mental Disorders.