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Comparison of the performance of the AUB-HAS2 Cardiovascular Risk Index in emergency vs elective surgeries
Eman Sbaity1, Hani Tamim1, Nader G Zalaquett1
1American University of Beirut Medical Center, Beirut, Lebanon.
Insights
The AUB-HAS2 Cardiovascular Risk Index effectively stratifies risk for both emergency and elective surgeries. This validated tool demonstrates good discriminatory power, aiding preoperative cardiovascular evaluation.
Area of Science:
- Cardiovascular Surgery
- Surgical Risk Assessment
- Health Services Research
Background:
- The AUB-HAS2 Cardiovascular Risk Index is a novel tool for preoperative cardiovascular risk assessment.
- It incorporates six key data elements: cardiac history, angina/dyspnea symptoms, age ≥ 75, hemoglobin < 12 g/dL, vascular surgery, and emergency surgery.
Purpose of the Study:
- To compare the performance and risk stratification capabilities of the AUB-HAS2 index in emergency versus elective non-cardiac surgeries.
- To evaluate the index's discriminatory power across different surgical settings.
Main Methods:
- Analysis of 1,167,414 non-cardiac surgeries from the American College of Surgeons National Surgical Quality Improvement Program database.
- Patients were assigned an AUB-HAS2 score based on the presence of the six risk factors.
- Outcomes measured included 30-day mortality, myocardial infarction, and stroke.
Main Results:
- The AUB-HAS2 index demonstrated a gradual increase in risk with higher scores in both emergency (7.0%) and elective (1.4%) surgery cohorts (p<0.0001).
- The index exhibited good and comparable discriminatory power in both groups, with AUCs of 0.804 for emergency and 0.791 for elective surgeries.
- Higher incidence of adverse outcomes was observed in emergency surgeries compared to elective surgeries (p<0.0001).
Conclusions:
- The AUB-HAS2 index is a versatile and effective tool for stratifying cardiovascular risk in both emergency and elective surgical patients.
- The index possesses good discriminatory power, proving equally useful across diverse surgical contexts.
Background:
The AUB-HAS2 Cardiovascular Risk Index is a newly derived tool for preoperative cardiovascular evaluation. It is based on six data elements: history of heart disease, symptoms of angina or dyspnea, age ≥ 75 years, hemoglobin < 12 g/dl, vascular surgery, and emergency surgery. This study compares the performance of this new index among emergency and elective surgeries.
Methods And Results:
The study population consisted of 1,167,414 non-cardiac surgeries registered in the American College of Surgeons National Surgical Quality Improvement Program database (153,715 were emergency and 1,013,699 were elective). Each patient was given an AUB-HAS2 score of 0, 1, 2, 3, or >3 depending on the number of data elements s/he has. The outcome measure (death, myocardial infarction, or stroke at 30 days after surgery) was higher in emergency than elective surgeries (7.0 % vs 1.4 %, p < 0.0001). The AUB-HAS2 index was able to stratify risk in both types of surgeries with a gradual increase in risk as the score increased (p < 0.0001). The discriminatory power of the AUB-HAS2 index, measured by the area under the receiver operator characteristic curves, was good and similar in the two types of surgeries (0.804 for emergency vs 0.791 for elective surgeries).
Conclusion:
The AUB-HAS2 index is a versatile tool that can effectively and equally stratify risk in both emergency and elective surgeries with a good discriminatory power.
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