Table 1.
Characteristics of Sample by Level of Suicidal Behavior
| Nonsuicidal (n = 1,456) | Ideation (n =280) | Ideation + plan (n = 62) | Ideation + plan + attempt or ideation + attempt (n = 91) | Chi-square p value | |
| Age (M, [SD]) | 21.2 (4.4) | 22.1 (4.0) | 22.0 (4.0) | 22.1 (4.1) | |
| Male (n = 949) | 81.6 | 13.9 | 2.8 | 1.6 | .0003 |
| Female (n = 970) | 75.3 | 16.2 | 3.9 | 4.6 | |
| Paternal race | |||||
| White (n = 1,794) | 78.2 | 15.1 | 3.4 | 3.2 | |
| Non-White (n = 125) | 81.5 | 14.3 | 2.5 | 1.7 | .730 |
| Paternal suicidea | |||||
| No (n = 967) | 78.8 | 14.8 | 3.4 | 3.1 | |
| Yes (n = 139) | 76.0 | 17.3 | 3.1 | 3.6 | .749 |
| Maternal suicidea | |||||
| No (n = 800) | 79.8 | 14.9 | 2.6 | 2.7 | |
| Yes (n = 166) | 74.8 | 16.0 | 4.6 | 4.6 | .069 |
| Parental nicotine dependenceb | |||||
| No (n = 516) | 79.3 | 15.9 | 2.6 | 2.2 | |
| Yes (n = 591) | 77.6 | 14.3 | 4.1 | 4.0 | .033 |
| Maternal nicotine dependencec | |||||
| None (n = 640) | 78.3 | 15.1 | 3.4 | 3.3 | |
| Low (n = 204) | 78.4 | 16.4 | 2.0 | 3.2 | |
| High (n = 252) | 78.7 | 14.1 | 4.4 | 2.8 | .652 |
| Paternal conduct disorder | |||||
| No (n = 984) | 77.3 | 14.8 | 3.1 | 4.8 | |
| Yes (n = 122) | 74.9 | 15.5 | 4.8 | 4.8 | .597 |
| Maternal conduct disorder | |||||
| No (n = 806) | 78.6 | 14.5 | 3.0 | 4.0 | |
| Yes (n = 268) | 73.8 | 15.7 | 3.8 | 6.7 | .059 |
| Offspring conduct disorder | |||||
| No (n = 1786) | 78.9 | 14.3 | 2.6 | 4.2 | |
| Yes (n = 132) | 53.0 | 22.0 | 12.1 | 12.9 | <.0001 |
| Offspring major depression | |||||
| No (n = 1698) | 82.9 | 12.7 | 2.4 | 2.0 | |
| Yes (n = 220) | 42.9 | 34.1 | 10.7 | 12.2 | <.0001 |
| Offspring alcohol/abuse dependence | |||||
| No (n = 1293) | 82.4 | 13.0 | 2.5 | 2.2 | |
| Yes (n = 562) | 69.4 | 19.9 | 5.3 | 5.3 | <.0001 |
| Offspring illicit drug abuse/dependence | |||||
| No (n = 1560) | 81.9 | 13.4 | 2.4 | 2.3 | |
| Yes (n = 295) | 60.3 | 24.1 | 8.1 | 7.5 | <.0001 |
| Offspring smoking | |||||
| Never (n = 628) | 84.8 | 12.1 | 2.1 | 1.0 | |
| Ever (n = 667) | 80.1 | 15.8 | 2.3 | 1.8 | |
| Regular smoker (n = 310) | 71.6 | 18.2 | 5.1 | 5.1 | |
| Nicotine dependent (n = 314) | 68.4 | 16.7 | 6.5 | 8.5 | <.0001 |
Note. aEver thinking about, planning, and making a suicide attempt.
b
DSM-III-R criteria.
c
Greater than four Heaviness of Smoking Index.