Related Experiment Videos
[Diabetes mellitus as cause of death]
J P Mackenbach1, I A Snels, L M Friden-Kill
1Erasmus Universiteit, Instituut Maatschappelijke Gezondheidszorg, Rotterdam.
Insights
Physician documentation of diabetes mellitus on death certificates varies widely, impacting accurate cause-of-death coding. This inconsistency, particularly with older patients, distorts the true contribution of diabetes mellitus to mortality statistics.
Area of Science:
- Medical certification practices
- Public health statistics
- Epidemiological data quality
Context:
- Accurate cause-of-death (COD) certification is crucial for public health surveillance.
- Diabetes mellitus is a significant comorbidity and cause of mortality.
- Previous studies highlight variability in medical certification.
Purpose:
- To assess the consistency and accuracy of diabetes mellitus certification on death certificates.
- To investigate the impact of coding practices on diabetes mellitus mortality data.
- To evaluate the reliability of current cause-of-death registration in the Netherlands.
Summary:
- Physicians demonstrated substantial variation in documenting diabetes mellitus on death certificates (none, contributory, or underlying cause).
- Central Bureau of Statistics coding introduced further inconsistencies, with older age correlating with lower probability of diabetes mellitus as an underlying cause.
- The study found significant discrepancies between physician certification and coded data.
Impact:
- Current cause-of-death registration in the Netherlands does not accurately reflect the contribution of diabetes mellitus to mortality.
- The underlying conceptualization of causes of death hinders accurate data.
- Potential improvements exist through modifications in certification and coding practices within the existing system.
Abstract:
Certification and coding of diabetes mellitus as a cause of death were investigated by sending a random sample of 300 physicians a set of 6 case histories. Of these, 228 (76%) participated in the study by completing a death certificate for each of these cases. The certificates were subsequently coded by the Central Bureau of Statistics. The main finding was that doctors varied enormously in the way in which diabetes mellitus was mentioned on the death certificate: not at all, as a contributory cause of death, or as an underlying cause of death. Coding removes some of the inconsistencies, but induces additional variation: a higher age of the deceased is associated with a lower probability of having diabetes mellitus coded as the underlying cause of death, and a higher probability of not receiving a code of diabetes mellitus at all. It is concluded that the cause-of-death registration does not provide an accurate picture of the contribution of diabetes mellitus to the cause-of-death pattern of the Netherlands. This is due, amongst other things, to the conceptualization of causes of death on which the registration is based. On the other hand, changes in certification and coding practice within the current system may already lead to some improvement.