Key result
Ensemble voting mechanism outperforms single machine learning classifiers for CAD prediction.
Why the study?
Early and accurate prediction of coronary artery disease based on physiological measurements can reduce the risk of heart attack, but optimal predictive methods are needed.
Does an ensemble voting mechanism improve the prediction of coronary artery disease compared to single machine learning classifiers?
Does an ensemble voting mechanism improve the prediction of coronary artery disease compared to single machine learning classifiers?
An ensemble machine learning approach combining co-expressed features improves the prediction of coronary artery disease compared to individual classifiers.
May enhance exploratory CAD prediction models; leaves open clinical utility pending prospective validation.
Background: Coronary artery disease (CAD) is one of the most representative cardiovascular diseases. Early and accurate prediction of CAD based on physiological measurements can reduce the risk of heart attack through medicine therapy, healthy diet, and regular physical activity. Methods:Four heart disease datasets from the UC Irvine Machine Learning Repository were combined and re-examined to remove incomplete entries, and a total of 822 cases were utilized in this study. Seven machine learning methods, including Naïve Bayes, artificial neural networks (ANNs), sequential minimal optimization (SMO), k-nearest neighbor (KNN), AdaBoost, J48, and random forest, were adopted to analyze the collected datasets for CAD prediction. By combining co-expressed observations and an ensemble voting mechanism, we designed and evaluated a new medical decision classifier for CAD prediction. The TOPSIS (Technique for Order Preference by Similarity to an Ideal Solution) algorithm was applied to determine the best prediction method for CAD diagnosis. Results: Features of systolic blood pressure, cholesterol, heart rate, and ST depression are considered to be the most significant differences between patients with and without CADs. We show that the prediction capability of seven machine learning classifiers can be enhanced by integrating combinations of observed co-expressed features. Finally, compared to the use of any single classifier, the proposed voting mechanism achieved optimal performance according to TOPSIS.
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Lo et al. (2016) studied Coronary artery disease (n=822). Ensemble voting mechanism with co-expressed observations vs. Single machine learning classifiers was evaluated on CAD prediction performance. An ensemble voting mechanism combining co-expressed observations achieved optimal performance for coronary artery disease prediction compared to any single machine learning classifier.
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