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Value of mortality data and necropsy records in monitoring morbidity in a population
1Institute of Social Medicine and History of Medicine, Semmelweis University of Medicine, Budapest, Hungary.
Insights
Necropsy records provide significantly more detailed morbidity and mortality data than physician certifications or screening follow-ups. Utilizing necropsy data could vastly improve population health assessments.
Area of Science:
- Gerontology and Public Health
- Medical Informatics and Data Analysis
Background:
- Accurate assessment of population morbidity and mortality is crucial for public health.
- Traditional data sources like physician death certifications and screening programs may have limitations in capturing the full spectrum of disease.
Purpose of the Study:
- To compare the diagnostic value of four data sources for population morbidity assessment: screening data, attending physician death certifications, doctor-coroner death certifications, and necropsy reports.
- To evaluate the completeness and accuracy of cause-of-death information across different data collection methods.
Main Methods:
- A cohort analysis of 1412 agricultural workers (aged ≥60 years) in Hajdúszoboszló, Hungary, examined between 1964-1966 and re-examined in 1989.
- Comparison of morbidity and mortality data from follow-up examinations with death certifications and necropsy reports (available for 144 individuals).
- Analysis of diagnostic discrepancies and information yield across the four data sources using ICD diagnostic categories.
Main Results:
- Necropsy reports revealed significant differences in causes of death compared to physician and coroner certifications, with deviations ranging from -91.6% to +74.8%.
- 19.4% of underlying causes of death were identified exclusively through necropsy.
- Necropsy data substantially increased the number of diagnostic categories identified and provided qualitatively different information, particularly for circulatory system diseases, while being less detailed for endocrine, neurological, and musculoskeletal disorders compared to follow-up examinations.
Conclusions:
- Necropsy records contain a wealth of valuable health information largely unavailable from other sources, potentially offering ninefold more data.
- There is a significant need to develop methods for integrating and utilizing the extensive data pool from necropsies to enhance population health surveillance and research.
Study Objective:
The aim was to compare the value of four sources of data in assessing morbidity in a population: (1) data from a screening programme including follow up records, (2) death certifications by attending physicians, (3) death certifications by doctor-coroners, and (4) necropsy reports.
Design:
The study was a cohort analysis of health and mortality in a sample of agricultural workers first examined in 1964-66 when they were aged 60 years or older. Follow up examinations enabled morbidity assessment to be made and ICD diagnostic categories to be compared with data available on persons in the cohort who had died.
Setting:
Hajdúszoboszló, a small town in eastern Hungary.
Participants:
1412 persons (96.1% of those aged greater than or equal to 60 years) were examined in 1964-6. Those still alive and available in 1989 were examined again. Necropsy records were available for 144 persons from the cohort in 1989 and were extensively reviewed in comparison with data available from other sources.
Measurements And Main Results:
Comparison of causes of death established at necropsy showed marked differences from those registered by attending physicians and doctor-coroners, deviations ranging from -91.6% to +74.8%; 19.4% of underlying causes of death occurred exclusively in the necropsy group. Major divergencies in diagnostic classification occurred in the three data sources, particularly for diseases of the circulatory system, where hypertensive renal disease, old myocardial infarction, acute cerebrovascular disease, and venous thrombosis were rarely documented by physicians/coroners. When necropsy data were used the number of diagnostic categories increased strikingly over the other sources of information. Necropsy records revealed quantitatively similar information on morbidity to follow up examination though there were qualitative differences, necropsy being less likely to document diagnoses of endocrine disorders, mental and neurological diseases, digestive disorders, and musculosketal disorders.
Conclusions:
Necropsy records contain much valuable material not available from other sources, exceeding by ninefold the amount of information reported at present. A way should be found to make use of this large data pool.
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