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한국성인 제2대구치 생존여부에 영향을 미치는 요인에 대한 로지스틱 회귀분석
Logistic regression analysis of factors affecting survival of permanent second molars in Korean adults한국성인 제2대구치 생존여부에 영향을 미치는 요인에 대한 로지스틱 회귀분석
김광석 ( Gwang Seok Kim ) , 이해진 ( Hae Jin Lee ) , 김영삼 ( Young Sam Kim ) , 전재규 ( Jae Gyu Jeon ) , 장기완 ( Kee Wan Chang )
UCI I410-ECN-0102-2014-500-001901244

Objectives: The purpose of this study was to analyze the factors affecting the survival of permanent second molars in Korean adults using logistic regression analysis. Methods: This National survey was conducted in 2006 and was performed in 3 stages comprising stratified sampling, age, sex, and region. This study included 15,777 persons, aged 2-95 years. The raw data was analyzed using SPSS software v12.0 and the relationship between the 9 variables and the tooth survival rate was analyzed by frequency and cross-tabulation. Logistic regression analysis using the functional weightage of the age, sex, regions of the Korean population was also performed. Entry was at level of 5%, while removal was at a 10% level during logistic regression analysis. The nine variables used for analysis were age, socio-economic level, monthly family income, sex, frequency of toothbrushing per day, diabetes, educational level, smoking, and frequency of snack intake per day. Results & Conclusions: The most significant explanatory variables, in increasing order of significance, were age, socioeconomic status, and diabetes. As age increased by 10 years, the survival rate of second molars decreased at a slow rate 7.5% to 9.5%. The survival rate of the second molar of an individual engaged in activities, such as farming, stock breeding, and fishing decreased from 64.4% to 78.8% as compared to people at high positions in various companies and in society.

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