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Introduction: The Barell body region by nature of injury diagnosis matrix standardizes data selection and reports, using a two dimensional array (matrix) that includes all International Classification of Diseases (ICD)-9-CM codes describing trauma.

Aim: To provide a standard format for reports from trauma registries, hospital discharge data systems, emergency department data systems, or other sources of non-fatal injury data. This tool could also be used to characterize the patterns of injury using a manageable number of clinically meaningful diagnostic categories and to serve as a standard for casemix comparison across time and place.

Concept: The matrix displays 12 nature of injury columns and 36 body region rows placing each ICD-9-CM code in the range from 800 to 995 in a unique cell location in the matrix. Each cell includes the codes associated with a given injury. The matrix rows and columns can …