School-based mental health intervention programs are critical for assessing trauma and associated risk factors for racially and ethnically diverse students. The PATHWAYS ("Providing Academic, Therapeutic and Healthy Ways to Achieve Youth Success") school-based mental health intervention program is a campus-community partnership that provides mental and behavioral health services to high-school students enrolled in the Boston Public Schools (BPS). The present study conducted a secondary analysis of deidentified data collected from students (ages 14-22) from 2013 to 2018 to explore trends in students' performance scores over time. Demographic variables were hypothesized as mediating factors for performance scores and mean differences were compared at the onset and conclusion of the intervention program. Comparison of means identified statistically significant improvements in adolescent strengths, lower difficulties, less use of negative coping skills and improved knowledge of PTSD symptoms. Consistent with the hypothesis of mediating demographic variables, there was a statistically significant finding with female adolescents in younger grades (e.g., 9-10th grade) reporting higher scores on a depression measure than younger males in the same grade, older male adolescents (e.g., over 16) reporting higher scores on a depression measure than younger male adolescents (e.g., 16 or below) and older U.S. born students (e.g., U.S. born and over 16) reporting more depression symptoms than older immigrant students (e.g., non-U.S. born and over 16). Interpretations and implications of these significant findings are discussed. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]