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Logo of nihpaAbout Author manuscriptsSubmit a manuscriptHHS Public Access; Author Manuscript; Accepted for publication in peer reviewed journal;
 
From:
J Consult Clin Psychol. Author manuscript; available in PMC 2013 July 8.
Published in final edited form as:
J Consult Clin Psychol. 2008 February; 76(1): 92–103.
doi: 10.1037/0022-006X.76.1.92

Table 1

Descriptive Statistics for Primary Study Variables and Tests of Gender Differences

VariableTotalBoysGirlsStatistic
Suicidal ideation, M (SD)
 Baseline2.99 (1.73)2.63 (1.81)3.14 (1.68)t(141) = 1.59
 3 months1.91 (1.17)1.65 (1.19)2.02 (1.15)t(117) = 1.57
 6 months1.72 (1.01)1.34 (0.48)1.89 (1.13)t(104.87)a = 3.49**
 9 months1.76 (1.11)1.34 (0.75)1.93 (1.18)t(78)a = 2.97*
 15 months1.53 (0.88)1.21 (0.27)1.66 (1.01)t(91.03)a = 3.49**
 18 months1.82 (1.23)1.31 (0.54)2.03 (1.37)t(99.87)a = 3.83**
Suicide attempts, n (%) reporting attempt
 Baseline (past year)66 (47.5%)13 (32.5%)53 (53.5%)χ2(1) = 5.06*
 3 months (n = 115)16 (13.9%)3 (8.6%)13 (16.3%)χ2(1) = 1.12, ns
 6 months (n = 105)3 (2.9%)03 (4.2%)
 9 months (n = 100)10 (10.0%)2 (6.7%)8 (11.4%)χ2(1) = 0.53, ns
 15 months (n = 101)3 (3.0%)03 (4.2%)
 18 months (n = 101)6 (5.9%)06 (8.5%)
Other baseline suicide behaviors, n (%)
 Suicide plan75 (53.6%)27 (36.0%)48 (64.0%)χ2(1) = 4.37*
 Threat/gestureb77 (74.8%)24 (31.2%)53 (68.8%)χ2(1) = 0.11, ns
Nonsuicidal self-injury, M (SD)
 Overall frequency1.48 (1.64)0.91 (1.56)1.75 (1.61)t(138) = 2.29*
 Frequency of specific behaviors1.54 (0.62)1.35 (0.57)1.61 (0.63)t(138) = 2.59*
Baseline psychological symptoms reported by adolescents, M (SD)c
 Major depression2.53 (3.02)1.16 (2.27)3.06 (3.12)t(91.97)a = 3.93**
 Social phobia1.40 (1.95)0.89 (1.62)1.60 (2.03)t(83.67)a = 2.12*
 Generalized anxiety1.19 (2.13)0.58 (1.43)1.43 (2.31)t(108.17)a = 2.58*
 PTSD3.29 (5.29)1.82 (4.01)3.87 (5.63)t(94.24)a = 2.38*
 Oppositional defiant2.09 (2.25)1.42 (2.05)2.35 (2.28)t(134) = 2.18*
 Conduct disorder1.16 (2.09)1.22 (2.21)1.13 (2.05)t(134) = 0.20, ns
Baseline psychological symptoms reported by parents, M (SD)d
 Major depression2.93 (3.26)2.44 (3.13)3.14 (3.31)t(112) = 1.04, ns
 Social phobia1.68 (1.97)1.59 (1.97)1.72 (1.99)t(112) = 0.33, ns
 Generalized anxiety1.08 (2.17)0.85 (1.74)1.18 (2.33)t(112) = 0.73, ns
 PTSD1.48 (3.65)1.09 (2.67)3.97 (2.59)t(112) = 0.75, ns
 Oppositional defiant4.24 (2.64)4.88 (2.67)3.96 (2.59)t(112) = −1.72, ns
 Conduct disorder1.73 (2.01)2.09 (2.11)1.57 (1.97)t(112) = −1.26, ns
Other baseline symptoms, M (SD)
 Depression (CDI)0.72 (0.36)0.63 (0.37)0.76 (0.35)t(141) = 2.01*
 Social anxiety2.55 (1.01)2.36 (0.95)2.63 (1.02)t(141) = 1.38
 Anxiety1.38 (0.56)1.29 (0.55)1.42 (0.57)t(141) = 1.15
 Delinquency (DBQ)1.77 (0.75)1.91 (0.82)1.72 (0.71)t(141) = −1.34
 BASC depression T78.93 (18.26)77.35 (14.94)79.43 (19.27)t(81) = −0.44
 BASC externalizing T73.06 (19.25)77.94 (16.86)71.65 (19.79)t(81) = 1.23
 Hopelessness (HSC)0.68 (0.29)0.72 (0.26)0.66 (0.30)t(141) = −0.95

Note. PTSD = posttraumatic stress disorder; CDI = Children’s Depression Inventory (Kovacs, 1992); DBQ = Delinquency Behavior Questionnaire; BASC = Behavioral Assessment System for Children (C. R. Reynolds & Kamphaus, 1992); HSC = Hopelessness Scale for Children (Kazdin, Rodgers, & Colbus, 1986).

aEqual variances not assumed.
bSuicide threats/gestures were not assessed for the first 22 participants enrolled in the study.
cA total of 135 adolescents completed the Youth Report of the National Institute of Mental Health Diagnostic Interview Schedule for Children—Fourth Edition (NIMH-DISC-IV; Shaffer et al., 2000).
dA total of 113 parents completed the Parent Report of the NIMH-DISC-IV.
*p < .05.
**p < .01.