Hospital separations: identification of records for use in tabulating national injury data

Approaches used to select records for tabulation of national injury hospitalization data were identified. Three of the approaches were based on the principal diagnosis in the hospital separation record; the other three required that the record contain a code for an external cause of injury. Differences within these two main groups resulted in identification of six distinct approaches. Each approach was applied to the same set of hospital separation data. The numbers and types of injury records retrieved with the six approaches are compared and implications of the findings for injury surveillance are discussed.