Table 2.
Descriptive characteristics of three suicidality groups: no suicide thoughts or attempt, suicide thoughts only, and suicide attempt
| Variable | No suicide thoughts/no suicide attempt N = 557 | Suicide Thoughts Only N =186 | Suicide Attempt N =147 | |||||
|---|---|---|---|---|---|---|---|---|
| N | % | N | % | N | % | Chi square (df=2) | p | |
| Abuse/neglect | 284 | 51.0 a | 98 | 52.7 a | 113 | 76.9 b | 32.38 | <0.01 |
| Female | 275 | 49.4 a | 89 | 47.8 a | 91 | 61.9 b | 8.32 | 0.016 |
| White | 316 | 57.1 a | 128 | 68.8 b | 95 | 64.6a,b | 9.13 | 0.008 |
| Mean | SD | Mean | SD | Mean | SD | F value | p | |
| Age at interview 1 | 29.36 | 3.81 | 29.44 | 3.74 | 28.76 | 3.71 | 1.64 | 0.194 |
| Age at interview 2 | 39.15 | 3.53 | 39.03 | 3.44 | 38.62 | 3.35 | 1.34 | 0.263 |
| IQ score (standardized) | 89.47 a | 13.24 | 93.13 b | 13.06 | 88.79 a | 11.71 | 6.46 | 0.002 |
| Interview 1 | Mean | SD | Mean | SD | Mean | SD | F value | p |
| Psychiatric Symptoms | ||||||||
| Depression | 2.72 a | 2.45 | 4.48 b | 2.73 | 5.33 c | 2.67 | 72.27 | <0.001 |
| Dysthymia | 1.89 a | 1.80 | 3.21 b | 2.16 | 3.99 c | 2.23 | 72.48 | <0.001 |
| PTSD | 4.27 a | 5.24 | 5.75 b | 5.68 | 8.84 c | 6.60 | 31.58 | <0.001 |
| GAD | 3.27 a | 4.51 | 5.39 b | 5.37 | 6.84 c | 5.76 | 31.78 | <0.001 |
| ASPD | 3.30 a | 3.40 | 4.31 b | 3.78 | 5.68 c | 4.43 | 20.72 | <0.001 |
| Substance use | 3.29 a | 3.92 | 5.56 b | 4.67 | 6.01 b | 5.23 | 30.04 | <0.001 |
| Environmental Vulnerability | ||||||||
| Social isolation | 2.28 | 1.01 | 2.23 | 1.05 | 2.45 | 1.19 | 1.8 | 0.141 |
| Physical illness/disabilities | 0.20 a | 0.48 | 0.24a,b | 0.48 | 0.36 b | 0.60 | 6.7 | 0.003 |
| Homelessness (N, %) | 83 | 14.9 a | 42 | 22.6 a | 57 | 38.8 b | 41.41 | <0.001 |
(a, b, c)
Notes: Pairwise comparisons are indicated with superscript letters. Significance level is determined by adjusted p values from Bonferroni correction or Tukey’s method. Groups that differ significantly from one another have different superscript letters. SD = standard deviation; Depression = major depressive disorder; PTSD = post-traumatic stress disorder; GAD = generalized anxiety disorder; ASPD = antisocial personality disorder. Psychiatric symptoms represent the number of lifetime symptoms. Substance use symptoms refer to the sum of the number of lifetime alcohol and drug symptoms from the DIS-III-R.