This study aimed to examine whether being a victim of bullying predicted body dissatisfaction and eating disorder behavior (EDB). In this study, we performed secondary analysis from a cluster randomized controlled trial among 5208 eight grade students from 73 public schools in three Brazilian cities. Data were collected in 2019 through an anonymous self-report questionnaire on bullying, body dissatisfaction, and EDB. We used factor analysis, multivariate linear regression, and multinomial logistic regression to verify whether being a victim of bullying during the baseline results in body dissatisfaction and EDB at the nine months follow-up for the control and intervention groups. Our results showed that being female (OR 1.41, 95% CI 1.22–1.63) is a risk factor for dissatisfaction by overweight. Bullying was not a predictor of body dissatisfaction; however, being a victim of bullying (β 0.40, 95% CI 0.35–0.46) is a predictor of having more EDB, independent of the exposure to the program. Therefore, bullying deserves attention in the school environment.

这项研究旨在探讨成为欺凌受害者是否会预测身体不满和饮食失调行为（EDB）。在这项研究中，我们对来自巴西三个城市 73 所公立学校的 5208 名八年级学生进行的整群随机对照试验进行了二次分析。数据是在 2019 年通过关于欺凌、身体不满和 EDB 的匿名自我报告调查问卷收集的。我们使用因子分析、多元线性回归和多项逻辑回归来验证在基线期间成为欺凌受害者是否会导致对照组和干预组在九个月的随访中身体不满意和 EDB。我们的结果表明，女性（OR 1.41，95% CI 1.22-1.63）是因超重而不满意的危险因素。欺凌并不是身体不满的预兆；然而，成为欺凌受害者（β 0.40，95% CI 0.35-0.46）是获得更多 EDB 的预测因素，与项目的暴露程度无关。因此，学校环境中的欺凌行为值得关注。