Bulletin 11 - Data issues
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Data issues
Deaths data are from the Australian Bureau of Statistics (ABS) mortality
unit record data collection. Detailed causes information is based on the most
recent deaths data: deaths registered in 1993. Single year of age analysis is
based on deaths registered between 1990 and 1992 to increase the number of
cases in each category (for a single year of age). Rates for these years are
calculated using 1991 Census single year populations.
NISU has been provided by the States with hospitalisation data for
1991-92 and 1992-93. These data cover hospital separations where an external
cause code was allocated. They are collected according to definitions included
in the National Health Data Dictionary by each State and Territory. Data for
the Northern Territory were not available. To maintain maximum comparability
between single year of age analyses based on deaths data and hospital
separations data, we used 1991-92 hospital separations data. Hospital
separation rate calculations are based on 1991 Census populations. (NISU
usually uses 1991-92 mid year populations for rate calculations on broad age
groups. The rates presented in this Bulletin will not therefore exactly match
other data released by NISU and will tend to be slightly higher.)
Emergency department data have been provided to NISU from approximately
50 participating hospitals during the period 1986 to 1994. They are based on
information volunteered by persons attending the emergency departments of those
hospitals, and treating doctors. The database contains in excess of half a
million records. The cases included do not represent a probability sample of
emergency department cases and therefore the pattern of injury of cases
attending these hospitals is not necessarily representative among all injuries in
Australia.
NISU statistical publications make use of standard aggregations of the
ICD9 External cause (E-code) classification. The E-code ranges for the major
causes of injury are shown in the table below.
| Cause of injury |
ICD9 E-Codes |
| Transportation |
800-848 |
| Drowning |
910 |
| Poisoning by drugs, etc. |
850-858 |
| Poisoning by other substances |
860-869 |
| Falls |
880-888 |
| Fires/burns/scalds |
890-899, 924/.0, .8, .9 |
| Other unintentional |
900-909, 911-923, 924/.1, 925-929 |
| Intentional, self inflicted |
950-959 |
| Intentional, inflicted by another |
960-978, 990-999 |
| Undetermined intent. |
980-989 |
| Medical misadventure, etc. |
870-879, 930-949 |
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