Klomek, Kleinman, Altschuler, Marrocco, Amakawa, and Gould (2011), conducted a correlational study examining high schoolers who experience bullying on a daily are at risk for depression and suicidality later in life. Two thousand three hundred forty-two high school students were assessed between the ages on 13-18 years old. Klomek et al. (2011), assessed the students from the fall of 2002 through the spring of 2004. They categorized the students into two groups, the at-risk only group and the not at-risk group, also known as the bully only group. The same measures were used in screening and follow-up assessments, and were done in an interview over the phone (Klomek et al., 2011). The measures that Klomek et al. (2011), included in their study were Beck Depression Inventory (BDI-IA), Suicidal Ideation Questionnaire, Suicide attempt history, Drug Use Screening Inventory (DUSI), Columbia Impairment Scale (CIS), and the students bullying/bullied experiences. This study showed that the students who reported frequent bullying behaviors, did not have depression or suicidal thoughts late on in life, as well as not having any psychological problems like the students who were at-risk for suicide (Klomek et al., 2011). Another main finding that the authors found, was that the students who experienced thoughts of suicide, bullying behaviors, and/or depression were more likely to be damaged than those who only reported having just depression or suicidality (Klomek et al., 2011).
Klomek, A. B., Kleinman, M., Altschuler, E., Marrocco, F., Amakawa, L., & Gould, M. S. (2011). High school bullying as a risk for later depression and suicidality. Suicide and Life-Threatening Behavior, 41, 501-516. doi:10.1111/j.1943-278X.2011.00046.x