• Journal of the korean academy of Pediatric Dentistry
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• v.47 no.1
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• pp.36-43
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• 2020

The aim of this study was to assess the occlusal relationships of primary dentition of Korean preschool children in Hwaseong city. Total 444 children of age group between 2 and 5 years were selected. One pediatric dentist took intraoral photos of children. Evaluation and categorization of the primary molar relationships were done by single examiner. Statistical analysis was performed with Pearson chi-squared test. Total 389 samples, which is consisted of 185 boys, 204 girls were satisfied with inclusion criteria. Bilateral mesial step was seen in 61.7%. Bilateral flush terminal plane was seen in 15.4%. When the primary molar relations of the right and left sides were not the same, the combination of the mesial step and flush terminal plane was 14.7%. The present study provides insight into occlusal relationships in the primary dentition of 2 - 5 years old of Korean children in Hwaseong city. Pediatric dentists should understand occlusal relationships of primary dentition for establishment of appropriate treatment strategies and occlusal guidance.

• Asian Pacific Journal of Cancer Prevention
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• v.16 no.10
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• pp.4429-4434
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• 2015

Background: Public awareness/knowledge on oral and pharyngeal cancer (OPC), potentially malignant disorders (PMODs) and their risk factors is crucial for prevention and early detection of OPC and PMODs. Yet, there are no published data available on the awareness and knowledge of OPC and PMODs among people living in Far North Queensland, Australia. Materials and Methods: This study was conducted as a cross sectional survey. A self-administered questionnaire was designed and consisted of relevant questions to ascertain socio-demographic information, awareness and knowledge of OPC, PMODs and risk factors and questions on participant's exposure to risk factors and dietary history were also included. Survey was carried out at the Dental Clinic of the James Cook University School of Dentistry (JCU Dental), Cairns, Australia. Subjects above the age of 20 years (n=366) were randomly selected during the period from 31st July to 6th September 2013 and questionnaire was distributed to complete while they are waiting for treatment. Data analysis was carried out using SPSS version 21 and the chi -squared test was employed to compare groups. P<0.05 was considered statistically significant. Results: The study revealed that 52.3% of the respondents were aware of the existence of OPC but only 19.0% were aware of PMODs. Of those who were aware of oral cancer, 92% agreed or strongly agreed that smoking is a strong risk factor for OPC. Similarly a relatively high proportion of the respondents agreed or strongly agreed that tobacco chewing (84%), tobacco chewing with areca nut (68%), chewing areca nut alone (51%) and exposure to actinic radiation (71%) as risk factors. However, the results for alcohol intake, age, and HPV infection were found to be relatively poor with proportions 33%, 34%, and 23% respectively. Conclusions: This study revealed an alarming lack of awareness and knowledge of OPC and PMODs.

• Imaging Science in Dentistry
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• v.44 no.1
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• pp.53-60
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• 2014

Purpose: This study was performed to investigate the incidence and configuration of the bifid mandibular canal in a Korean population by using cone-beam computed tomography (CBCT) imaging. Materials and Methods: CBCT images of 1933 patients (884 male and 1049 female) were evaluated using PSR-9000N and Alphard-Vega 3030 Dental CT units (Asahi Roentgen Ind. Co., Ltd, Kyoto, Japan). Image analysis was performed by using OnDemand3D software (CyberMed Inc., Seoul, Korea). The bifid mandibular canal was identified and classified into four types, namely, the forward canal, buccolingual canal, dental canal, and retromolar canal. Statistical analysis was performed by using the chi-squared test and one-way analysis of variance (ANOVA). Results: Bifid mandibular canals were observed in 198 (10.2%) of 1933 patients. The most frequently observed type of bifid mandibular canal was the retromolar canal (n=104, rate: 52.5%) without any significant difference among the incidence of each age and gender. The mean diameter of the accessory canal was 1.27 mm (range: 0.27-3.29 mm) without any significant difference among the mean diameter of each type of the bifid mandibular canal. The mean length of the bifid mandibular canals was 14.97mm(range: 2.17-38.8 mm) with only a significant difference between the dental canal and the other types. Conclusion: The bifid mandibular canal is not uncommon in Koreans and has a prevalence of 10.2% as indicated in the present study. It is suggested that a CBCT examination be recommended for detecting a bifid canal.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.9
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• pp.251-260
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• 2018

The purpose of this study was to determine the association of the Body Shape Index (ABSI) with suicide ideation and suicide attempts by controlling the body mass index (BMI), as well as general characteristics that may affect suicide. The study has used The Sixth Korea National Health and Nutrition Examination Survey conducted by the Korea Centers for Disease Control and Prevention from 2013 to 2015. A total of 13,155 participants were studied, excluding those who had no information on variables that could affect suicidal ideations and suicidal attempts. The chi-squared test and the multivariate logistic regression analysis were performed. The results of the analysis showed that those who had obesity in BMI were more likely to commit suicide and suicide than those who were in 'standard' in BMI. In ABSI, Q3 group was more likely to commit suicide than Q1 group. The number of suicide attempt was significantly higher in the group with Q3 in ABSI than in Q1 group (3.623 times (95% CI 1.027-12.772)). The results of this study suggest that a higher ABSI compared to BMI means that it is possible to make a more extreme choice of suicide attempt rather than suicide ideation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.8
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• pp.5169-5175
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• 2014

The aim of this study was to find the factors related to smoking-cessation among citizens receiving smoking-cessation clinics' services in a public health center in Daejeon metropolitan city. The study subjects were 2,125 participants registered in "smoking-cessation clinic", public health centers in 2007. Frequency analysis, chi-squared test and multiple logistic regression analysis were used to determine the relationships between the success rate of smoking-cessation and the characteristics. The success rate of smoking-cessation during 6 months was 39.8%. Males had a higher rate than females, and people over 65 years of age had a higher rate than those less than 40 years of age. High blood pressure, drinking of more 2 times per week, regular exercise, CO under 10ppm had significantly relationships with the smoking-cessation rate. The other independent variables had no statistically significance with the smoking-cessation success rate. Logistic regression analysis showed that age, number of nicotine patches used and total consultation times had significantly relationships with the smoking-cessation success rate. The total consultation times showed the highest odds ratio than the other significant factors. This study suggests that regular consultations will be the most effective intervention towards maintaining smoking cessation programs of smoking-cessation clinics in public health centers.

• Journal of dental hygiene science
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• v.15 no.1
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• pp.83-89
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• 2015

To investigate the necessity of periodontal treatments, and the association of the health lifestyle with periodontal treatments, the data of 11,488 adults targeted in the 5th (2010, 2012) National Health and Nutrition Examination Survey were used in this study. Chi-squared test was conducted to compare the subjects' general features with the health lifestyle of the patients who needed periodontal treatments. Logistic regression analyses were conducted to confirm the variables that could affect the necessity of periodontal treatments. As a result of verifying the necessity of periodontal treatments according to the general features and health lifestyle, the necessity decreased with the higher income level and education level, and in the cases of nonsmokers, frequent toothbrushing, and using oral hygiene products. When the subjects who did not had oral examinations, their necessity for periodontal treatments significantly increased (p<0.01). The variables that affected the necessity of periodontal treatments included residence, gender, education level, obesity, and oral examinations (p<0.01). Therefore, health lifestyle was thought an important variable that had affected the oral health status. Professional dental hygienists must provide people with action programs of health lifestyle to promote the national oral health status.

• Korean Journal of Childcare and Education
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• v.10 no.2
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• pp.111-131
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• 2014

This study aims to research the use of smart devices of infants and preschool children, and their mothers' perception about it. Moreover, the goal of this study is to collect preliminary data about problems from the use of smart devices, and to prevent the problems. Therefore, the questions of inquiry for this study are: 1. How do infants and preschool children use smart devices? 2. How do mothers perceive their children using smart devices? Four hundred and forty mothers, who send their child to a day-care center or kindergarten in Busan, participated in this research and data among 397 of them were analyzed using PASW 18.0 program. The answers to a multiple-choice question were converted into a frequency and percentage. To verify the difference of factors, Chi-squared Test and One-way Analysis of Variance methods were used. The following are findings of this study: 1. Most of the families owning smart devices allow their children to use a smart device when children want it, and children use it for entertainment purpose before their bedtime. Children start to use a smart device mostly around the age of 4. Compared to girls, boys spend a longer time on smart devices playing mobile game. In addition, the research indicated that the children of younger mothers tend to use smart devices in earlier ages than the children of elder mothers. 2. Mothers of preschool children have higher perception about the availability of their child using smart devices compare to the mothers of day-care center. However, the research showed that elder mothers have more positive perceptions about all the other five lower factors, (e.g. educational characteristic, entertainment characteristic, design, safety, and smart recognition).

• Journal of Digital Convergence
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• v.13 no.1
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• pp.407-414
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• 2015

This study was executed to be used as the basic data for the improvement of hospital therapy by analyzing the characteristic of principal diagnosis of pure death patients. 428 pure death patients were selected as study subjects out of 1992 dead patients at K university hospital in Daejeon city for three years in 2011, 2012, 2013, and chi-squared test and fisher's correct tests and canonical correlation analysis were used as analysis methods. In the analysis results about general characteristic and top 4 canonical correlation analysis, pneumonia(J18) of organism unspecified and toxic action(T60) of pesticide showed significant results among the principal diagnosis. In the pneumonia of organism unspecified(J18), significant results were identified with the order of car insurance, ages from 15 to 29, health insurance and medical benefits, and in the toxic action of pesticide(T60), significant results were identified with the order of health insurance, medical benefits, car insurance, ages from 45 to 59, Sejong Chungnam. In conclusion, in order to reduce the death of elderly population, quality improvement in medical service and establishment of emergency medical service delivery system are very important to reduce pure death patients.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.7
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• pp.1103-1110
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• 2013

This study was investigated the subjects' satisfaction in the therapy among the internet age. The subjects of the study were 200 women who have menses in ages from 18 to 55 among visitors of five public health centers and attendants of A church in Gwangju. The period of the study ranged from September 6 to October 10, 2010. As a study instrument, this study used a questionnaire developed based on questions from studies published by An Seung-duk(2003). This study used SPSS 17.0, for a frequency analysis, a cross-tabulation and a chi-squared test. During the analysis, 43.4% of the subjects used the complementary alternative therapy. 56.3% visited used oriental medical clinics or herbal medicine shops as places to use the therapy, 42.5% received medicine, acupuncture, moxibustion and cupping at oriental medical clinics. As expenses of the therapy, 56.3% spent less than 500,000 won a year. After the therapy, 51% answered they were satisfied with the therapy. In conclusion, it was discovered that use rate of the therapy is increasing, the subjects decided to use the therapy for themselves or through recommendation from acquaintances, and they mainly depended on reliable oriental medical clinics or folk remedies against menstrual pain, and insurance benefits for the therapy should be considered except oriental medical hospitals or clinics.

• 대한공업교육학회지
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• v.40 no.2
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• pp.22-43
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• 2015

The purpose of this study was to analyze students' expectation for specialized subjects teacher's role of technical high school. The study was carried out through questionnaire survey method. A survey questionnaire was developed by researcher to collect the information needed for the study. It consists of 15 items. 428 questionnaires were used for analysis. A chi squared test was used for data analysis. Major findings of this study were as follows: First, when specialized subjects teachers lecture major theory subject classes, students of technical high school wanted it to be according to their level. Their practical class preference differed depending on their department. For the security guidance method during practical class, students most wanted teachers constantly instructing in class. Second, students of technical high school wanted their teachers to pay attention to personality guidance during student life guidance & counseling time. They hoped that teachers would not discriminate towards wrong doings. Also students wanted career the most as a counseling topic and expected a guidance role from teachers. Third, students of technical high school wanted teachers to work hard to create a harmonious class atmosphere when managing a class. They wanted teachers to have affection for class and students. They wanted teachers making jokes easily with students to get friendly. Fourth, students of technical high school hoped 'employment and entrance higher grade school' the most as a career guidance topic. They wanted teachers to consider their aptitude when they were counseling about finding a job and wanted to learn more about job information during employment instructions.