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Factors associated with health indicators in patients undergoing coronary artery bypass surgery
1Center for the Study of Clinical Reasoning, The Gertner Institute for Epidemiology and Health Policy Research, Sackler School of Medicine, Tel Aviv University, Sheba Medical Center, Tel Hashomer, Israel. maory@post.tau.ac.il
Insights
Coronary artery bypass graft (CABG) surgery outcomes are influenced by patient factors like origin, gender, and health status. Identifying high-risk populations can help determine who may not benefit from CABG.
Area of Science:
- Cardiovascular Surgery
- Health Outcomes Research
- Patient Risk Stratification
Background:
- Coronary artery bypass graft (CABG) surgery aims to alleviate angina, enhance functional capacity, facilitate return to work, and improve overall health.
- Limited data exists on patient attributes influencing these key surgical outcomes.
Purpose of the Study:
- To investigate patient-specific attributes that impact the success of CABG surgery.
- To identify factors associated with angina recurrence, functional capacity, return to work, and perceived health post-CABG.
Main Methods:
- Prospective data collection from 4,012 patients undergoing CABG across 14 Israeli medical centers in 1994.
- Structured questionnaires administered by trained nurses pre-operatively and 4-5 months post-operatively.
- Logistic regression models developed to analyze predictors of angina recurrence, functional capacity, return to work, and health perception, considering sociodemographic, comorbidity, and cardiac disease severity variables.
Main Results:
- Multivariate analysis identified Sephardic Jewish origin, female gender, left ventricular dysfunction, and diabetes mellitus as significant predictors across multiple health outcome models.
- The study population comprised a mean age of 63.8 years, with 79.3% males; 59.9% underwent elective procedures, and 17.3% had left main coronary artery disease.
Conclusions:
- Risk factors for various health indicators following CABG surgery show considerable overlap.
- It is feasible to define a high-risk patient population that might not experience significant benefits from CABG surgery.
Background:
The main goals of coronary artery bypass graft (CABG) surgery for most patients are to relieve angina, to improve functional capacity, to return to work, and to improve health. A limited amount of information is available regarding the various attributes that are associated with achieving these goals.
Study Objectives:
To investigate different patient attributes affecting these outcomes.
Design:
Prospective data collection.
Setting:
Fourteen medical centers that perform CABG surgery in Israel.
Patients:
The 4,012 patients who underwent CABG surgery during 1994.
Measurements:
Trained nurses collected data using structured questionnaires prior to and 4 to 5 months after the operation. Using logistic regression, four risk models were created to the following health indicators: recurrence of angina, functional capacity, return to work, and perception of health. Candidate variables were sociodemographic details, major comorbidities, risk factors for cardiac disease, and severity of cardiac disease.
Results:
The mean age of the patients was 63.8 years old, 79.3% were men, 59.9% were elective operations, and left main disease was found in 17.3%. Multivariate logistic regression revealed that the variables that significantly contributed to three or more of the models were Sephardic Jewish origin, female gender, left ventricular dysfunction, and diabetes mellitus.
Conclusions:
There is a similarity between risk factors of various health indicators in CABG surgery patients. Thus, it is possible to define a population at high risk that may not benefit from the procedure.