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This report provides an overview of the purpose of the supplementary analysis as well as a summary of key findings. In the supplementary analysis, data from the NIS-4 and the National Child Abuse and Neglect Data System (NCANDS) were used to examine the comparability of information reported by the two studies on children investigated by Child Protective Services (CPS), including data on the number of children investigated, the dispositional outcome of investigation, the types of maltreatment experienced by children, and the children’s age, sex, and race/ethnicity.