New classification for deaths and injuries involving terrorism.

Classification of the deaths and injuries that occurred as the result of the events of September 11, 2001, presented CDC's National Center for Health Statistics (NCHS) with a dilemma. Under the current classification systems for mortality and morbidity, the World Health Organization's International Classification of Diseases, Tenth Revision (ICD-10) and the United States' International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM), deaths and injuries associated with acts of terrorism could not be identified uniquely.