The quality of cause of death data for young Australian men

Accuracy and consistency of death certification and coding practices in Australia were examined in relation to a defined population of 552 young men who died aged 20 to 40 years. For each death a mock death certificate was prepared by a team of physicians using all available clinical, pathological, and coronial data. These certificates, and their International Classification of Diseases (ICD 8) codes derived by an Australian Bureau of Statistics (ABS) nosologist, were compared with the actual death registration papers and their ICD 8 codes. Data for deaths from malignant neoplasms were also compared with results of histopathological review. The mock death certificates were superior to the true death certificates in both completeness of content and accuracy of the recorded cause of death. The major source of discrepancies was unsatisfactory narrative on the original death certificates, the standard of which varied with Australian state and with cause of death. The cause of death coding by ABS was of high standard, but its coding practices generally identify only death certificates where content is inadequate for specific coding. Where the narrative is sufficiently specific to be coded there is no mechanism for checking the accuracy of the cause of death recorded. Suggestions are made for improving the narrative.