Objectives: This study aimed to investigate the relationship between toothache, oral health behaviors, and the quality of health-related life of Korean adults. A national nutrition survey representative of Korea was used. The study presents basic material for developing health improvement and dental health programs to highlight the importance of oral health management and Health-Related Quality of Life improvement. Methods: The second edition of the 8th national health nutrition survey data was used for this study. The subjects were 5,922 Korean adults aged 19 years and above. Results: There was a significant difference in gender, age, marital status, education, income, toothache experience, subjective oral health condition, and the number of daily toothbrushes in participants' Health-Related Quality of Life. For gender, "male" had an overall higher quality of life which was statistically significant. In toothache experience, Health-Related Quality of Life was significantly higher at 0.027 with "none" (P<0.01). In addition, higher conditions of subjective oral health at 0.077 showed a significantly higher quality of life (P<0.01). Conclusions: This study revealed that higher subjective oral health conditions in Korean adults resulted in higher Health-Related Quality of Life and subjectively better oral health conditions. This means that active health management is possible, and concrete systematic health education program development is urgently needed. Oral health improvement can improve Health-Related Quality of Life. It is necessary to recognize the importance of oral health to improve Health-Related Quality of Life through oral health prevention and promotion programs for adults.

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Objectives: This study was to survey the distribution of Korean high school students’ dietary habits, body mass index (BMI) and oral symptom experiences and analyze the relevance of those to contribute to the development of a program to prevent and manage their oral diseases.Methods: The analysis was based on the raw data of the 15th Online Youth Health Behavior Survey in 2019 and the subjects were 27,919 high school students which went under complex sample analysis.Results: In the dietary habits of the subjects, the highest were ‘once or twice a week’ with 33.8% in recent 7 days’ fruit intake frequency, 42.9% of ‘once or twice a week’ in soda intake frequency, 35.8% of ‘once or twice a week’ in sweet drinks frequency, and 56.1% of ‘once or twice a week’ in fast food frequency. BMI showed the highest 52.9% of ‘normal’, 19.5% of ‘obesity’, 14.1% of ‘overweight’, and 13.5% of ‘underweight’ in order. In the recent 12-month experience of oral disease symptoms, the highest was 39.2% of ‘none’ with 25.4% of ‘one’, 18.0% of ‘more than three’, and 17.4% of ‘two’ in order. In the affecting factors on BMI ‘3 or 4 times a week’ in soda, ‘once or twice a week’ in sweet drinks were significantly high and ‘3 or 4 times a week’ were significantly low in vegetable intake (p< 0.05). The affecting factors on oral disease symptoms were significantly lower with male than female, and those on academic achievements and economic status were significantly lower in ‘mid’ than in ‘low’ (p< 0.01). ‘Once or twice a week’ soda intake and less sweet drinks and fast food were significantly low (p< 0.01). Less vegetable intake showed significantly higher (p< 0.01), and there were no significant relevance between BMI and oral disease symptoms.Conclusions: It is suggested that a program be developed as soon as possible for preventing and managing oral diseases for adolescents to grow up to be healthy adults in terms of surveying characteristic distribution of dietary habits, BMI and oral disease symptoms and analyzing the relevance among them efficiently.

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Objectives: The purpose of this study was to investigate the morbidity and treatment recovery rates for the conditions and injuries of infants who were hospitalized and treated.Methods: The analysis was based on infants under the age of 1 from the 2nd-15th data (patients discharged from 2006 to 2018) of the Korea Centers for Disease Control and Prevention’s ‘In-Depth Discharge Injury Survey’.Results: As a result of the study, it was confirmed that most infants admitted to the hospital from 2006 to 2018 improved and were discharged with an overall improvement rate of 98.47%. In addition, the morbidity rate of infants admitted to hospitals with specific conditions originating before and after birth showed a steady decrease, but increased around 2018, and the morbidity rate of infants hospitalized due to injury showed a gradual decrease, and showed a sharp decline after 2015. It was found that the overall infant condition improvement rate increased and the injury morbidity rate was rapidly decreasing.Conclusions: If systems and policies are established to provide medical services to mothers and newborns who are in medically vulnerable groups, as well as to improve the high-risk maternal emergency system and high-risk neonatal intensive care unit, it is possible to reduce the risk of diseases and unintentional damage that can occur before and after childbirth. Therefore, it is suggested that the morbidity rate can be improved.