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Comparison between clinical and autopsy diagnoses in a cardiology hospital
Rafael Saad1, Alice Tatsuko Yamada, Fernando Henrique Ferraz Pereira da Rosa
1Heart Institute (InCor), University of São Paulo Medical School, Brazil.
Insights
Older age increases diagnostic errors between clinical and autopsy findings, while intensive care reduces them. Pulmonary embolism showed the highest discrepancy rate in this cardiology hospital study.
Area of Science:
- Medical diagnostics
- Clinical pathology
- Autopsy studies
Background:
- Diagnostic accuracy is crucial in cardiology.
- Few studies compare clinical and autopsy diagnoses in specialized cardiac hospitals.
Purpose of the Study:
- To evaluate diagnostic accuracy by comparing clinical and autopsy diagnoses.
- To identify factors influencing diagnostic discrepancies in a cardiology setting.
Main Methods:
- Analysis of 406 consecutive autopsy cases over two years.
- Categorization of diagnostic discrepancies (Classes I-V) based on therapeutic/prognostic impact.
- Statistical analysis using Chi-squared test and logistic regression.
Main Results:
- Increasing age significantly raised the risk of major diagnostic discrepancies (Classes I-II).
- Intensive care unit admission decreased the risk of major discrepancies.
- Pulmonary embolism had the highest diagnostic discrepancy rate (34.1% in Classes I-II).
- Concordance rates varied: 71.1% for myocardial infarction, 75% for aorta dissection, 73.1% for infective endocarditis, and 35.2% for pulmonary embolism.
Conclusions:
- Age and hospital ward significantly influence diagnostic concordance/discrepancy.
- Lower discrepancy rates for myocardial infarction and infective endocarditis may be due to the specialist hospital environment.
Background:
A few recent studies have evaluated diagnostic accuracy by comparison between clinical and autopsy diagnoses in a hospital specialising in cardiology.
Methods:
406 consecutive autopsy cases during 2 years were studied. Patients were aged 47.4+/-28.4 years; 236 (58.1%) were men and 170 (41.9%) women. Diagnostic comparison was categorised in classes I to V (I, II, III and IV: discrepancy in decreasing order of importance regarding therapy and prognosis; V: concordance). Categorisation was ranked on the basis of the highest degree of discrepancy. Statistical analysis was performed with the Chi(2) test and stepwise logistic regression.
Results:
Each age increase of 10 years added 16.2% to the risk of the diagnostic comparison to be categorised in classes I and II (major discrepancy) in comparison to classes III, IV and V (OR 1.16, 95% CI 1.07 to 1.27, p<0.001). By contrast, admission to intensive care units decreased the risk of categorisation in classes I and II by 47% (OR 0.53, 95% CI 0.32 to 0.85, p = 0.009). The most frequent diagnostic discrepancy occurred for pulmonary embolism: 30 out of 88 (34.1%) diagnoses in classes I and II. The concordance rate was 71.1% for acute myocardial infarction, 75% for aorta dissection, 73.1% for infective endocarditis and 35.2% for pulmonary embolism.
Conclusion:
Age and hospital ward influenced the distribution of diagnostic discrepancy or concordance between clinical and autopsy diagnoses. The lower discrepancy rate for myocardial infarction and infective endocarditis may be related to the fact that the study was carried out in a specialist hospital.
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