Replication Data for: Utility of the 3Di short version in the identification and diagnosis of autism in children at the Kenyan Coast

We conducted this study to (i)evaluate the reliability of the Swahili version of the 3Di-sv in the detection of autism in children from rural Kenyan settings; (ii) determine the factorial structure of Swahili 3Di-sv, (iii) investigate the measurement invariance of the Swahili 3Di-sv in these settings; and (iv) compute the criterion validity of the Swahili 3Di-sv while comparing its scores against the diagnosis from either DSM-IV-TR or DSM-5. This study was carried out in a defined area, the Kilifi Health and Demographic Surveillance System (KHDSS), in Kilifi County on the Kenyan coast. This study was nested in a large epidemiological study (NDD Study) that screened 11,223 children randomly selected from 28,000 children aged 6 to 9 years within the KHDSS. 11,223 children were successfully screened with the INCLEN neurodevelopmental disorders screening tool (NDST) in stage I. There are eight autism-specific questions in the NDST. Approximately 2,162 children from stage I were invited for further clinical and neuropsychological assessments, including administration of the ADOS (targeted to a proportion of children screening positive in autism-specific questions) and 3Di (targeted to every child in stage 2).

本研究旨在达成以下四项研究目标：(1) 评估斯瓦希里语版3Di-sv在肯尼亚农村地区儿童自闭症筛查中的信度；(2) 明确斯瓦希里语版3Di-sv的因子结构；(3) 考察该量表在上述研究场景中的测量不变性；(4) 计算斯瓦希里语版3Di-sv的效标效度，并将其得分与《精神障碍诊断与统计手册第四版修订版（DSM-IV-TR）》或《精神障碍诊断与统计手册第五版（DSM-5）》给出的正式诊断结果进行对比。

本研究的实施地点为肯尼亚沿海地区基利菲县的基利菲健康与人口监测系统（KHDSS）划定的研究区域。

本研究嵌套于一项大型流行病学研究（神经发育障碍研究，Neurodevelopmental Disorders Study, NDD Study）之中，该研究从KHDSS辖区内28000名6至9岁的儿童中随机抽取11223名进行初筛。第一阶段，研究团队采用INCLEN神经发育障碍筛查量表（Neurodevelopmental Disorders Screening Tool, NDST）完成了全部11223名儿童的有效筛查，该量表共包含8道自闭症特异性筛查题目。

第一阶段筛查结束后，研究团队邀请约2162名儿童参与后续的临床与神经心理学评估，评估内容包括自闭症诊断观察量表（Autism Diagnostic Observation Schedule, ADOS）的施测（针对在自闭症特异性筛查题目中呈阳性的部分儿童），以及3Di量表的施测（针对第二阶段的所有受试儿童）。