Machine learning aids in accurate diagnosis of pediatric bipolar disorders

Published on August 23, 2022

Diagnosing pediatric bipolar disorder (PBD) can be challenging, leading to potential misdiagnosis. However, machine learning algorithms have been developed to assist in the classification of bipolar disorder (BD). In this study, researchers used structural magnetic resonance imaging (MRI) data to extract brain features for classification. By reducing the dimensionality of the features and applying various classifiers, such as logistic regression and support vector machine, the accuracy of the classification was evaluated. The top two classifiers with the highest accuracy were LR (84.19%) and SVM (82.80%). These findings revealed important regions in the brain associated with PBD, such as the right middle temporal gyrus and bilateral pallidum. This study marks progress in implementing computer-aided diagnosis of BD in pediatric patients, providing a valuable tool for accurate diagnosis.

The diagnosis based on clinical assessment of pediatric bipolar disorder (PBD) may sometimes lead to misdiagnosis in clinical practice. For the past several years, machine learning (ML) methods were introduced for the classification of bipolar disorder (BD), which were helpful in the diagnosis of BD. In this study, brain cortical thickness and subcortical volume of 33 PBD-I patients and 19 age-sex matched healthy controls (HCs) were extracted from the magnetic resonance imaging (MRI) data and set as features for classification. The dimensionality reduced feature subset, which was filtered by Lasso or f_classif, was sent to the six classifiers (logistic regression (LR), support vector machine (SVM), random forest classifier, naïve Bayes, k-nearest neighbor, and AdaBoost algorithm), and the classifiers were trained and tested. Among all the classifiers, the top two classifiers with the highest accuracy were LR (84.19%) and SVM (82.80%). Feature selection was performed in the six algorithms to obtain the most important variables including the right middle temporal gyrus and bilateral pallidum, which is consistent with structural and functional anomalous changes in these brain regions in PBD patients. These findings take the computer-aided diagnosis of BD a step forward.

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