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KMID : 1118520190160080588
Psychiatry Investigation
2019 Volume.16 No. 8 p.588 ~ p.593
Detection of Suicide Attempters among Suicide Ideators Using Machine Learning
Ryu Seung-Hyong

Lee Hyeong-Rae
Lee Dong-Kyun
Kim Sung-Wan
Kim Chul-Eung
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.
KEYWORD
Suicide attempt, Suicide ideation, Machine learning, Public health data
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SCI(E) ÇмúÁøÈïÀç´Ü(KCI) KoreaMed