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Artificial intelligence approach to classify unipolar and bipolar depressive disorders

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Abstract

Machine learning approaches for medical decision-making processes are valuable when both high classification accuracy and less feature requirements are satisfied. Artificial neural networks (ANNs) successfully meet the first goal with its adaptive engine, while nature-inspired algorithms are focusing on the feature selection (FS) process in order to eliminate less informative and less discriminant features. Besides engineering applications of ANN and FS algorithms, medical informatics is another emerging field using similar methods for medical data processing. Classification of psychiatric disorders is one of the major focus of medical informatics using artificial intelligence approaches. Being one of the most debilitating psychiatric diseases, bipolar disorder (BD) is frequently misdiagnosed as unipolar disorder (UD), leading to suboptimal treatment and poor outcomes. Thus, discriminating UD and BD at earlier stages of illness could therefore help to facilitate efficient and specific treatment. The use of quantitative electroencephalography (EEG) cordance as a biomarker has greatly enhanced the clinical utility of EEG in psychiatric and neurological subjects. In this context, the paper puts forward a study using two-step hybridized methodology: particle swarm optimization (PSO) algorithm for FS process and ANN for training process. The noteworthy performance of ANN–PSO approach stated that it is possible to discriminate 31 bipolar and 58 unipolar subjects using selected features from alpha and theta frequency bands with 89.89 % overall classification accuracy.

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Acknowledgments

The authors would like to express their thanks to NPIstanbul Hospital for providing the required EEG data.

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Authors and Affiliations

  1. Department of Computer Engineering, Faculty of Engineering and Natural Sciences, Uskudar University, Altunizade Mah. Haluk Turksoy Sk. No: 14, 34662, Uskudar/Istanbul, Turkey

    Turker Tekin Erguzel

  2. Department of Psychiatry, NPIstanbul Hospital, Istanbul, Turkey

    Gokben Hizli Sayar & Nevzat Tarhan

  3. Department of Psychology, Faculty of Humanities and Social Sciences, Uskudar University, Istanbul, Turkey

    Gokben Hizli Sayar & Nevzat Tarhan

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  1. Turker Tekin Erguzel
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Erguzel, T.T., Sayar, G.H. & Tarhan, N. Artificial intelligence approach to classify unipolar and bipolar depressive disorders. Neural Comput & Applic 27, 1607–1616 (2016). https://doi.org/10.1007/s00521-015-1959-z

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