Abstract
This study investigated the application of a recurrent neural network for optimising pharmacological treatment for depression. A clinical dataset of 458 participants from specialist and community psychiatric services in Australia, New Zealand and Japan were extracted from an existing custom-built, web-based tool called Psynary . This data, which included baseline and self-completed reviews, was used to train and refine a novel algorithm which was a fully connected network feature extractor and long short-term memory algorithm was firstly trained in isolation and then integrated and annealed using slow learning rates due to the low dimensionality of the data. The accuracy of predicting depression remission before processing patient review data was 49.8%. After processing only 2 reviews, the accuracy was 76.5%. When considering a change in medication, the precision of changing medications was 97.4% and the recall was 71.4% . The medications with predicted best results were antipsychotics (88%) and selective serotonin reuptake inhibitors (87.9%). This is the first study that has created an all-in-one algorithm for optimising treatments for all subtypes of depression. Reducing treatment optimisation time for patients suffering with depression may lead to earlier remission and hence reduce the high levels of disability associated with the condition. Furthermore, in a setting where mental health conditions are increasing strain on mental health services, the utilisation of web-based tools for remote monitoring and machine/deep learning algorithms may assist clinicians in both specialist and primary care in extending specialist mental healthcare to a larger patient community.











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Acknowledgements
The authors would like to thank Dr. Andrew Kissane and Dr. Richard Tranter for allowing the use of the Psynary data, their ongoing support and professional input into the research work. Aidan Cousins is a 4th year medical student with University of New South Wales undertaking his Honours research project.
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This research did not receive any specific grant from funding agencies in the public, commercial, private or not-for-profit sectors.
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Aidan Cousins and Lucas Nakano were involved in study design, implementation and analysis and drafting of the manuscript. Rasa Kabaila and Emma Schofield were involved in study design and expert review.
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This research was approved by the clinical research ethics committee of University of Otago (New Zealand, approval #:H16/014), Asai Hifuka Institutional Review Board (Japan, approval #:承認番号: 20170724-1) and the North Coast NSW Human Research Ethics Committee (Australia, approval #:HREA271 2019/ETH13489).
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Cousins, A., Nakano, L., Schofield, E. et al. A neural network approach to optimising treatments for depression using data from specialist and community psychiatric services in Australia, New Zealand and Japan. Neural Comput & Applic 35, 11497–11516 (2023). https://doi.org/10.1007/s00521-021-06710-3
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DOI: https://doi.org/10.1007/s00521-021-06710-3