BACKGROUND AND AIMS This study aims to examine the rates of potentially traumatic events (PTEs) and polyvictimization, as well as interrelationships among PTE types in children and youth with intellectual developmental disorder (IDD) and co-occurring mental health issues. It also examines the association between polyvictimization (experiencing three or more PTEs) and externalizing symptoms, controlling for IDD severity, sex and age. METHOD The study utilized archival data collected from 2012 to 2020 by trained assessors (e.g., nurses, social workers, psychologists) at intake into clinical mental health services in the Province of Ontario, Canada. The sample included 502 children and youth (age range: 4-18 years) who were assessed using the interRAI Child and Youth Mental Health and Developmental Disability (ChYMH-DD) instrument. Using this standardized assessment, trained clinicians reported on children's demographics, traumatic life events, and externalizing symptoms (proactive and reactive aggression) among other physical and mental health indicators. RESULTS 64.74 % of the children had experienced at least one type of PTE, whereas 33.06 % experienced lifetime polyvictimization. Most of the PTE types were positively correlated, with the strongest associations between physical, emotional abuse, witnessing domestic violence, and parental addiction. In a multivariate model, experiences of three or more PTEs (vs. none), mild or moderate IDD (vs. severe/profound), male sex (vs. female) were associated with greater externalizing symptoms. There was a quadratic relationship between age and externalizing symptoms. CONCLUSION The project advances knowledge on trauma and polyvictimization patterns and their association with IDD severity and externalizing symptoms in this population. Trauma-informed services should be tailored to the specific needs of these children.

中文翻译：

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患有 IDD 和心理健康问题的儿童的创伤性生活事件、多重伤害和外化症状。

背景和目的 本研究旨在检查潜在创伤事件 (PTE) 和多重受害的发生率，以及患有智力发育障碍 (IDD) 和共同发生的心理健康问题的儿童和青少年的 PTE 类型之间的相互关系。它还检查了多重受害（经历三个或更多 PTE）与外化症状之间的关联，控制 IDD 的严重程度、性别和年龄。方法 该研究利用了 2012 年至 2020 年由经过培训的评估员（例如护士、社会工作者、心理学家）在加拿大安大略省进入临床心理健康服务时收集的档案数据。样本包括 502 名儿童和青少年（年龄范围：4-18 岁），他们使用 interRAI 儿童和青少年心理健康和发育障碍 (ChYMH-DD) 工具进行评估。使用这种标准化评估，训练有素的临床医生报告了儿童的人口统计学、创伤性生活事件和外化症状（主动和被动攻击）以及其他身心健康指标。结果 64.74% 的儿童至少经历过一种类型的 PTE，而 33.06% 的儿童经历了终生多重受害。大多数 PTE 类型呈正相关，身体、情感虐待、目睹家庭暴力和父母成瘾之间的关联最强。在多变量模型中，三个或更多 PTE（与无）、轻度或中度 IDD（与重度/深度）、男性（与女性）的经历与更大的外化症状相关。年龄和外在症状之间存在二次关系。结论 该项目推进了关于创伤和多重受害模式及其与该人群 IDD 严重程度和外化症状的关联的知识。创伤知情服务应根据这些儿童的具体需求量身定制。