Exploring the association between bullying and depression symptoms among adolescents in Bangladesh: Findings from nationally representative survey

Bullying victimization is an important public health concern that has been linked to adverse psychological outcomes among adolescents. The study used mental health well-being data collected in the most recent Bangladesh Adolescent Health and Wellbeing Survey (2019–2020) (BAHWS). A total of 9,116 adolescents aged 15–19 years with complete depression data were included in the analysis. A three-level linear mixed-effects model was employed to account for the hierarchical structure of the survey, with adolescents nested within primary sampling units and districts. Additional analyses examined gender and marital status interactions, subgroup differences, and the cumulative association between multiple forms of bullying and depressive symptoms using a composite bullying measure. The findings revealed that verbal bullying (β = 1.39, p < 0.001) and cyberbullying (β = 1.15, p = 0.012) were independently associated with higher depressive symptom scores. The association between physical bullying and depressive symptoms differed significantly by gender, whereas interactions of gender with verbal and cyberbullying were not statistically significant. Exploratory subgroup analyses showed variation in the magnitude of estimated associations across ever-married females, unmarried females, and unmarried males. A graded association was observed for cumulative bullying exposure: compared with adolescents reporting no bullying exposure, those exposed to on (β = 1.25), two (β = 2.61), and three (β = 4.99) bullying types had progressively higher depressive symptom scores (all p < 0.001). Adolescent Age, Current school or college attendance and higher household wealth were associated with lower depressive symptom scores. Bullying victimization, particularly verbal bullying, cyberbullying, and exposure to multiple forms of bullying, was associated with higher depressive symptoms among Bangladeshi adolescents. These findings highlight the need for comprehensive bullying prevention strategies and accessible psychosocial support services, with particular attention to adolescents experiencing multiple forms of bullying and other vulnerable groups.