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Comparison between Machine Learning and Traditional Tecnique for Suicide Prediction based on Meta-analysis

메타분석에 기반한 자살 예측 연구에서 전통적 통계 기법과 머신러닝 기반 접근법의 예측력 비교

  • Hyeokjun Kwon (Yeungnam University) ;
  • Jonghan Sea (Yeungnam University)
  • 권혁준 (영남대학교 심리학과) ;
  • 서종한 (영남대학교 심리학과)
  • Received : 2024.02.16
  • Accepted : 2024.04.29
  • Published : 2024.08.31

Abstract

The purpose of this study was to compare the predictive accuracy of traditional prediction models (methods) and machine learning algorithms in predicting suicidal behaviors. The research aimed to go beyond a systematic review level and scientifically examine the predictive capabilities of these two techniques through meta-analysis, analyzing variables identified through domestic research, particularly at the regional level. In order to achieve this, a total of 124 studies, including 50 studies utilizing machine learning and 74 studies employing traditional methods, were included in the meta-analysis. The results of the study revealed that the integrated area under the curve (AUC) for studies using traditional methods was .770, which was lower than the integrated AUC value of .853 for studies using machine learning. Particularly, studies conducted in Asia (AUC = .944) demonstrated higher accuracy compared to studies in Western countries (AUC = .820) and Korea (AUC = .864). Additional analysis of the moderating effects in domestic research indicated that a higher proportion of males and the prediction of suicide attempts were associated with higher prediction accuracy. On the other hand, prediction accuracy was lower when the prediction target was suicide deaths and when studies utilized neural network analysis. This study synthesized various research findings on the prediction of suicidal behaviors, verified the effectiveness of prediction using machine learning, and holds significance in exploring variables applicable in the context of South Korea.

본 연구는 자살 관련 행동에 대해 전통적인 예측 모형(기법)과 머신러닝 알고리즘을 활용한 연구의 예측력을 비교하기 위한 목적에서 수행되었다. 따라서 체계적 리뷰 수준에서 벗어나 메타분석을 통해 과학적으로 두 가지 기법의 예측력에 대해 살펴보고, 지역적인 수준에서 특히 국내 연구를 통해 알 수 있는 변인들을 분석하여 추후 자살 관련 행동 예측 연구에 도움을 주고자 하였다. 이를 위해 머신러닝을 사용한 연구 50개와 전통적 기법을 활용한 연구 74개로 총 124개의 문헌이 메타분석에 포함되었다. 연구 결과 전통적 기법을 활용한 연구들의 통합 AUC는 .770으로 머신러닝을 활용한 연구들의 통합 AUC값인 .853보다 낮은 것으로 나타났다. 특히 아시아권의 연구(AUC = .944)가 서양(AUC = .820)과 한국(AUC = .864)의 연구에 비해 높은 정확도를 나타내었다. 국내 연구에서의 조절효과를 추가적으로 분석한 결과 남성의 비율이 많을수록, 예측 대상이 자살 시도일수록 예측 정확도가 높았으며, 예측 대상이 자살 사망일수록, 그리고 신경망분석(Neural Network)을 활용한 연구일수록 예측 정확도가 낮았다. 본 연구는 자살 관련 행동의 예측에 대한 다양한 연구결과를 종합하고, 머신러닝을 활용한 예측의 효과성을 검증하는 한편, 국내에서 활용가능한 변인을 탐색하는 데 그 의의가 있다.

Keywords

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