Citation

Ryu S, Lee H, Lee DK, Kim SW, Kim CE. Psychiatry Investig. 2019; 16(8): 588-593.

Affiliation

Mental Health Research Institute, National Center for Mental Health, Seoul, Republic of Korea.

Copyright

(Copyright © 2019, Korean Neuropsychiatric Association)

DOI

10.30773/pi.2019.06.19

PMID

31446686

Abstract

OBJECTIVE: We aimed to develop predictive models to identify suicide attempters among individuals with suicide ideation using a machine learning algorithm.

METHODS: Among 35,116 individuals aged over 19 years from the Korea National Health & Nutrition Examination Survey, we selected 5,773 subjects who reported experiencing suicide ideation and had answered a survey question about suicide attempts. Then, we performed resampling with the Synthetic Minority Over-sampling TEchnique (SMOTE) to obtain data corresponding to 1,324 suicide attempters and 1,330 non-suicide attempters. We randomly assigned the samples to a training set (n=1,858) and a test set (n=796). In the training set, random forest models were trained with features selected through recursive feature elimination with 10-fold cross validation. Subsequently, the fitted model was used to predict suicide attempters in the test set.

RESULTS: In the test set, the prediction model achieved very good performance [area under receiver operating characteristic curve (AUC)=0.947] with an accuracy of 88.9%.

CONCLUSION: Our results suggest that a machine learning approach can enable the prediction of individuals at high risk of suicide through the integrated analysis of various suicide risk factors.

Language: en

Keywords

Machine learning; Public health data; Suicide attempt; Suicide ideation