Data on the number and characteristics of injury deaths among Arizona residents 19 or less years old were obtained from the death certificates filed with the Arizona Department of Health Services.
In this report, fatal injuries as the underlying cause of death are defined and coded according to ICD-9 (International Statistical Classification of Diseases, Injuries and Causes of Death. Geneva: World Health Organization, 1977) in the following manner:
---E800-E949: fatal unintentional injuries;
---E950-E979: specified intent, self-inflicted injury in suicide (E950-E959)
and injuries purposely inflicted by other person (E960-E979);
---E980-E989: unknown intent, an investigation by a medical or legal authority has not determined whether the injuries are unintentional, homicidal or suicidal.
Population denominators for Arizona residents under age 20, used to calculate rates, are projections from the Population Statistics Unit in the Arizona Department of Economic Security (data for 1983-1989 and 1993-1995) and the U.S. Census Bureau (data for 1990). Detailed population data by gender, age and county were unavailable for 1991-1992. In order to obtain the population denominators for these two years, the 1990 percentages of population breakdowns (or census shares) were applied to 1991 and 1992 total state or county population estimates published by the DES.
The aggregation of 1985-1995 data made it possible to increase the reliability of proportions and rates by age group, ethnicity and county of residence. Eleven-year summary rates, calculated for the entire period 1985-1995, provide more accurate description when the number of events is small and/or events occur in small populations. These rates are shown in Table 5, Table 19 and Table 20, as well as in Figures 1, 5-7. Ten-year summary rates for 1980-1989 are shown in Table 1 and Figures 3 and 8.
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