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Comparison between Korea and the United States about smoking and tooth loss

Issue Date
2013
Description
Dept. of Dentistry/석사
Abstract
Various different chemicals are contained in cigarettes and when they combust, majority of poisonous chemicals are produced and some of them are found to cause cancer. One of the most common reasons for tooth loss among adult populations is periodontal disease, also known as gum disease is known to be affected by smoking. Smokers show higher prevalence of periodontitis compared to never smokers and smokers also have a higher chance of redeveloping periodontitis later even after treatment. Periodontal disease eventualy can lead to tooth loss. In this study, the National Health and Nutrition Examination Survey for the four years from 2007-2010 for Korea and the United States was used by conducting investigation based on subjects aged 19 and older with existing dental examination records. The association between smoking history and tooth loss and edentulism was investigated and the influence of demographic factors, socio-economic factors and prevalence of diabetes. Therefore, to determine association between tooth loss and smoking using two countries nationally representative data was the purpose of this study. The results were as follows: 1) Results of performing chi-square analysis with smoking history as the dependent variable showed the statistically significant results for age group (p<0.0001), gender (p<0.0001), education attainment level (p<0.0001), insurance status (p<0.0001) and prevalence of diabetes (p<0.0001) for both countries. Level of income for Korea showed (P=0.010). 2) Results of performing chi-square analysis with prevalence of edentulism as the dependent variable showed that edentulism was a statistically significant factor for age group (p<0.0001), education attainment level (p<0.0001), level of income (p<0.0001), insurance status (p<0.0001) and prevalence of diabetes (p<0.0001). For NHANES gender (p=0.453), smoking history for KNHANES (p=0.059) and NHANES (p=0.168) did not show statistically significant results. 3) Results performing t-test and ANOVA analysis with number of tooth loss as the dependent variable showed that increased number of tooth loss with increased in age group for both KNHANES and NHANES (p<0.0001) were shown. Gender (p<0.0001), education attainment level (p<0.0001), level of income (p<0.0001), insurance status (p<0.0001) prevalence of diabetes (p<0.0001) and smoking history (p<0.0001) were all statistically significant factor for number of tooth loss for both KNHANES and NHANES. 4) Results of performing simple logistic regression analysis with edentulism as the dependent variable showed that smoking history factor for KNHANES (odds ratio 1.16) and NHANES (odds ratio 0.88) was a statistically not significant factor (p=0.06) and (p=0.16) respectively. 5) Results of performing multiple logistic regression analysis with edentulism as the dependent variable with demographic factors and prevalence of diabetes showed that smoking history (p<0.0001), age group (p<0.0001) and education attainment level (p<0.0001) were statistically significant factors. Also other statistically significant factors were level of income (upper vs. low) for KNHANES and NHANES (p<0.0001). From the above results, smoking was the risk factor for tooth loss and becoming edentulism for both countries.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/134660
Appears in Collections:
2. 학위논문 > 2. College of Dentistry (치과대학) > 석사
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