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.

The present study was conducted to assess gender differences in the relationship between adiposity and systolic inter-arm blood pressure difference (sIAD) in Korean adults. In this paper, we propose a 410 adults (235 men and 175 women) who were over 30 years old and had undergone a health check participated from June to November 2013. The incidences of high sIAD (sIAD ≥10 mmHg) in males and females were 24.6% and 15.3%, respectively. We conducted a logistic regression analysis after adjusting for variables such as age, smoking, drinking, exercising, TC, TG, HDL-C, and FPG. Key study results were as follows: First, in men, the odds ratio (OR) of high sIAD of the obesity group was significantly higher than that of the normal weight group [2.25 (95% confidence interval (CI), 1.19-4.25)], but abdominal obesity was not associated with high sIAD. Second, in women, the OR of high sIAD of the abdominal obesity group was significantly higher than that of the non-abdominal obesity group [2.52 (95% CI, 1.03-6.13)], but obesity status was not associated with high sIAD. In conclusion, Obesity is associated with the incidence of high sIAD in Korean men, and abdominal obesity is associated with the incidence of high sIAD in Korean women.▸Keyword : inter-arm blood pressure difference,adiposity,obesity,abdominal obesity,gender differences I . In t r o duct i o n Obesity is one of the most important public health problems due to its association with many chronic diseases, such as cardiovascular disease, hypertension, diabetes mellitus, and dyslipidemia [1][2][3][4]. In addition, abdominal obesity has consistently been shown to be related to the increased risk of cardiovascular disease, such as peripheral vascular disease, hypertension, and insulin resistance [5][6][7][8].The systolic inter-arm blood pressure difference (sIAD) is found in normal people by examining the