Press Release

Development of a classifier for gambling disorder based on functional connections between brain regions

April 15, 2022

Abstract

Aim
Recently, a machine-learning (ML) technique has been used to create generalizable classifiers for psychiatric disorders based on information of functional connections (FCs) between brain regions at resting state. These classifiers predict diagnostic labels by a weighted linear sum (WLS) of the correlation values of a small number of selected FCs. We aimed to develop a generalizable classifier for gambling disorder (GD) from the information of FCs using the ML technique and examine relationships between WLS and clinical data.

Methods
As a training dataset for ML, data from 71 GD patients and 90 healthy controls (HCs) were obtained from two magnetic resonance imaging sites. We used an ML algorithm consisting of a cascade of an L1-regularized sparse canonical correlation analysis and a sparse logistic regression to create the classifier. The generalizability of the classifier was verified using an external dataset. This external dataset consisted of six GD patients and 14 HCs, and was collected at a different site from the sites of the training dataset. Correlations between WLS and South Oaks Gambling Screen (SOGS) and duration of illness were examined.

Results
The classifier distinguished between the GD patients and HCs with high accuracy in leave-one-out cross-validation (area under curve (AUC = 0.89)). This performance was confirmed in the external dataset (AUC = 0.81). There was no correlation between WLS, and SOGS and duration of illness in the GD patients.

Conclusion
We developed a generalizable classifier for GD based on information of functional connections between brain regions at resting state.

Journal Article

JOURNALPsychiatry and Clinical Neurosciences

TITLE:Development of a classifier for gambling disorder based on functional connections between brain regions

DOIhttps://doi.org/10.1111/pcn.13350

Correspondence to

Hidehiko Takahashi, M.D., Ph.D., Professor

Department of Psychiatry and Behavioral Sciences,
Graduate School of Medical and Dental Sciences,
Tokyo Medical and Dental University(TMDU)
E-mail:hidepsyc(at) tmd.ac.jp


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