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AutoML과 라이프로그를 활용한 인지기능 장애 예측모형

Cognitive Impairment Prediction Model Using AutoML and Lifelog

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주제분류컴퓨터학

초록

본 연구는 고령층의 치매 예방을 위한 선별검사 수단으로 자동화된 기계학습(AutoML)을 활용하여인지기능 장애 예측모형을 개발하였다. 연구 데이터는 한국지능정보사회진흥원의 ‘치매 고위험군 웨어러블 라이프로그 데이터’를 활용하였다. 분석은 구글 코랩 환경에서 PyCaret 3.0.0이 사용하여 우수한분류성능을 보여주는 5개의 모형을 선정하고 앙상블 학습을 진행하여 모형을 통합한 뒤, 최종 성능평가를 진행하였다. 연구결과, Voting Classifier, Gradient Boosting Classifier, Extreme Gradient Boosting, Light Gradient Boosting Machine, Extra Trees Classifier, Random Forest Classifier 모형 순으로 높은 예측성능을보이는 것으로 나타났다. 특히 ‘수면 중 분당 평균 호흡수’와 ‘수면 중 분당 평균 심박수’가 가장 중요한특성변수(feature)로 확인되었다. 본 연구의 결과는 고령층의 인지기능 장애를 보다 효과적으로 관리하고예방하기 위한 수단으로 기계학습과 라이프로그의 활용 가능성에 대한 고려를 시사한다.

Abstract

This study developed a cognitive impairment predictive model as one of the screening tests for preventing dementia in the elderly by using Automated Machine Learning(AutoML). We used ‘Wearable lifelog data for high-risk dementia patients’ of National Information Society Agency, then conducted using PyCaret 3.0.0 in the Google Colaboratory environment. This study analysis steps are as follows; first, selecting five models demonstrating excellent classification performance for the model development and lifelog data analysis. Next, using ensemble learning to integrate these models and assess their performance. It was found that Voting Classifier, Gradient Boosting Classifier, Extreme Gradient Boosting, Light Gradient Boosting Machine, Extra Trees Classifier, and Random Forest Classifier model showed high predictive performance in that order. This study findings, furthermore, emphasized on the the crucial importance of 'Average respiration per minute during sleep' and 'Average heart rate per minute during sleep' as the most critical feature variables for accurate predictions. Finally, these study results suggest that consideration of the possibility of using machine learning and lifelog as a means to more effectively manage and prevent cognitive impairment in the elderly.

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