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12세 아동 우식경험영구치아수 예측을 위한 머신러닝 알고리즘의 적용

Prediction of dental caries in 12-year-old children using machine-learning algorithms

대한구강보건학회지 2020년 44권 1호 p.55 ~ 63
양용훈 ( Yang Yong-Hoon ) - 부산대학교 치의학전문대학원 예방과사회치의학교실

김지수 ( Kim Ji-Soo ) - 부산대학교 치의학전문대학원 예방과사회치의학교실
정승화 ( Jeong Seung-Hwa ) - 부산대학교 치의학전문대학원 예방과사회치의학교실

Abstract


Objectives: The decayed-missing-filled (DMFT) index is a representative oral health indicator. Prediction of DMFT index is an important basis for the development of public oral health care projects and strategies for caries prevention. In this study, we used data from the 2015 Korean children’s oral health survey to predict DMFT index and caries risk groups using statistical techniques and four different machine-learning algorithms.

Methods: DMFT prediction models were constructed using multiple linear regression and four different machine-learning algorithms: decision tree regressor, decision tree classifier (DTC), random forest regressor, and random forest classifier (RFC). Thereafter, their accuracies were compared.

Results: For the DMFT predictive model, the prediction accuracy of multiple linear regression and RFC were 15.24% and 43.27%, respectively. The accuracy of DTC prediction was 2.84 times that of multiple linear regression. The important feature of the machine-learning model, which predicts DMFT index and the caries risk group, was the number of teeth with sealants.

Conclusions: Using data from the 2015 Korean children’s oral health survey, which is considered big data in the field of oral health survey in Korea, this study confirmed that machine-learning models are more useful than statistical models for predicting DMFT index and caries risk in 12-year-old children. Therefore, it is expected that the machine-learning model can be used to predict the DMFT score.

키워드

Decayed-missing-field-teeth; Decision tree algorithm; Machine learning; Prediction; Random forest algorithm
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