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[Mortality risk estimation in cardiac surgery]
Michele Danilo Pierri1, Mauro Borioni, Gianfranco Iacobone
1Divisione di Cardiochirurgia, Istituo Cardiologico G. M. Lancisi, Ancona. micheledpierri@yahoo.it
Insights
The Society of Thoracic Surgeons (STS) and Northern New England (NE) risk scores accurately predict cardiac surgery mortality, while the EuroSCORE (ES) tends to overestimate it.
Area of Science:
- Cardiovascular Surgery
- Medical Statistics
- Health Outcomes Research
Background:
- Predicting operative mortality after cardiac surgery is crucial for patient management and risk stratification.
- Existing risk models require validation in diverse patient populations and surgical contexts.
Purpose of the Study:
- To evaluate and compare the predictive accuracy of three established risk models for operative mortality in cardiac surgery patients.
- To assess the performance of the Society of Thoracic Surgeons (STS) risk score, EuroSCORE (ES), and Northern New England Cardiovascular Disease Study Group (NE) score.
Main Methods:
- A retrospective analysis of 3111 cardiac surgery patients from an Italian institutional database.
- Risk factors were collected, and predicted mortality was calculated using STS, ES, and NE scores.
- Model performance was assessed using Receiver Operating Characteristic (ROC) curves.
Main Results:
- Observed mortality in the myocardial revascularization cohort was 2.2%.
- Mean predicted mortality rates were 1.9% (STS), 4.2% (ES), and 1.9% (NE).
- ROC curves indicated good predictive ability for all models (0.82 for STS, 0.77 for ES, 0.78 for NE).
Conclusions:
- All three risk models demonstrated acceptable accuracy in predicting operative mortality after cardiac surgery.
- The EuroSCORE (ES) consistently overestimated mortality across all risk levels.
- STS and NE scores showed comparable and reliable performance in this patient cohort.
Background:
The aim of this study was to compare the ability of three risk models to predict operative mortality after cardiac surgery.
Methods:
Risk factors of 3111 patients (73% male, mean age 65.2 +/- 10.7 years) were derived from our institutional database at the Cardiac Surgery Department of the G.M. Lancisi Hospital, Ancona, Italy. The predicted mortality was derived from the Society of Thoracic Surgeons risk score (STS), the EuroSCORE (ES) and the Northern New England Cardiovascular Disease Study Group score (NE).
Results:
The observed mortality in the myocardial revascularization population (1995 patients) was 2.2% (43 patients). The mean predicted mortality by STS, ES and NE was 1.9, 4.2 and 1.9%, respectively. The predictive ability of the models was measured by means of the ROC curve. Curves were respectively of 0.82, 0.77 and 0.78.
Conclusions:
All tested models proved e good accuracy level but ES showed a constant overestimation of mortality at all risk levels.
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