• Imaging Science in Dentistry
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• v.45 no.4
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• pp.205-211
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• 2015

Purpose: This study was performed to compare the accuracy of micro-computed tomography (CT) and cone-beam computed tomography (CBCT) in detecting accessory canals in primary molars. Materials and Methods: Forty-one extracted human primary first and second molars were embedded in wax blocks and scanned using micro-CT and CBCT. After the images were taken, the samples were processed using a clearing technique and examined under a stereomicroscope in order to establish the gold standard for this study. The specimens were classified into three groups: maxillary molars, mandibular molars with three canals, and mandibular molars with four canals. Differences between the gold standard and the observations made using the imaging methods were calculated using Spearman's rho correlation coefficient test. Results: The presence of accessory canals in micro-CT images of maxillary and mandibular root canals showed a statistically significant correlation with the stereomicroscopic images used as a gold standard. No statistically significant correlation was found between the CBCT findings and the stereomicroscopic images. Conclusion: Although micro-CT is not suitable for clinical use, it provides more detailed information about minor anatomical structures. However, CBCT is convenient for clinical use but may not be capable of adequately analyzing the internal anatomy of primary teeth.

• Child Health Nursing Research
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• v.23 no.2
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• pp.147-157
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• 2017

Purpose: This study was done to investigate the relationship between knowledge, attitude, and practice toward breast self-examination (BSE) among middle and high school girls. Methods: A cross-sectional descriptive study was conducted using self-report questionnaires. Participants were 412 students, 137 middle and 275 high school girls. Data were collected from December 7 to 23, 2016 and analyzed using t-test and Spearman correlation coefficient. Results: The percentage of correct answers for knowledge about breast self-examination among middle and high school girls was 29.2%. The mean score for practice ($5.89{\pm}0.10$) among middle and high school girls was low. For knowledge, there were significant differences according to grade (t=5.93, p<.001), having heard about BSE (t=4.02, p<.001), experience of BSE (t=2.51, p=.012), and need for education (t=3.37, p=.001). In practice, there were significant differences according to having heard about BSE (t=3.64, p<.001), experience of BSE (t=2.64, p=.017). Knowledge level of BSE positively correlated with practice of BSE (r=.21, p<.001). Conclusion: Research results suggest that education on BSE for middle and high school girls is needed to increase the possibility of early detection of breast cancer.

• The Korean Journal of Rehabilitation Nursing
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• v.3 no.2
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• pp.169-181
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• 2000

The purpose of this study was to identify the effect of follow-up care for stroke survivors on primary caregivers' quality of life. Quasi-experimental research was conducted in which an experimental group and a control group-each of 15 stroke survivors and their primary caregivers-were consecutively sampled. Data collected from July to September, 1999 by interview using a structured questionnaire with both the experimental and the control groups. After a month, the two groups were given the same questionnaire. The experimental group was also given a telephone follow-up every week for a month, as well as a home visit. The survey instruments used in this study were Saha and Cooper's "Modified Barthel Index" (11 items) for checking the stroke survivors' level of activities of daily living, and a modified form of Jeong's "Quality of life" (18 items) for primary caregivers' QOL level. The obtained data were analyzed by percentage, t-test, $X^2$-test, Kruscal-Wallis test, Spearman correlation coefficient by SAS/PC program. The results were as follows: 1. There was no significant difference in the stroke survivors' ADL level, though the level of the experimental group was higher than that of the control group. 2. There was a statistical difference in the before and after treatment of the primary caregivers' QOL level. In conclusion, the follow-up care program had a useful effect on the quality of life of primary caregivers.

• Journal of Korean Clinical Nursing Research
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• v.23 no.1
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• pp.110-119
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• 2017

Purpose: The purpose of this study was to test validity and reliability of the Korean-Sieloff King Assessment of Group Outcome Attainment within organization in Korea (K-SKAGOAO), and also to explore the relationship of Korean nursing group power and job satisfaction, organizational commitment, organizational performance. Methods: Participants were 481 nurse managers, nurse unit managers or staff nurses with over 7 years experience. Data were collected by post mail and analyzed using descriptive statistics, ANOVA, Kruskal-Wallis test, Tukey test, and Spearman's correlation. Results: Content Validity Index was over .82 and Cronbach's ${\alpha}$ coefficient for the K-SKAGOAO was .97. The mean score for Korean nursing group power was 136.77 among the total participants, 139.89 among nurse managers, 136.74 among nurse unit managers and 132.47 among staff nurses. These results showed high nursing group power in Korea nursing organization in hospitals. There was also a significant difference according to nurse position (p=.003). Korean nursing group power was positively related to job satisfaction, organizational commitment, and organizational performance. Conclusion: Findings show that the K-SKAGOAO has validity and reliability. Nursing groups can use the K-SKAGOAO to evaluate the nursing group power of each nursing organization and to develop strategies to improve nursing power and nursing outcomes.

• Journal of the East Asian Society of Dietary Life
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• v.7 no.2
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• pp.199-210
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• 1997

The purpose of this study was to investigate the mutual relationship between food preference and nutrient intake status of high school students, based on the their personal characters which are sex, age, family type, number of family, mother's age, occupation, and school career. 439 students were selected with random stratified cluster sampling method. The study used a self-administrated questionnaire and 24-hour recall method for 5 days as instrument tools. Statistical methods applied to analyze the data were frequency, percent, Willcoxon Rank-sum test, Kruskal-Wallis test, ${x^2}-test$ by contingence table, and Spearman's correlation coefficient in non parametric statistical methods. Some of interesting results are as follows : 1. The correlation between sex and the set of characters of mother's age, school career and income is highly significant. However there is no any significant difference on the kinds of job and the types of family. 2. The relation between the preference of main dishes and the nutrient intake show a significant difference except to the noodles. This marks that preference of main dishes shows a direct proportion with the nutrient intakes except for the fat, vitamin A, vitamin C. 3. The preference of animal food marks a direct proportion with the nutrients such as energy, protein, fat, fiber, phosphorus, iron, vitamin $B_{1}$, vitamin $B_{2}$, and niacin 4. The preference of vegetable food gives some influence on the nutrient intake but the preference of soup is insignificant, the preference of Kimchi is in reverse proportion, and the preference of vegetable marks a direct proportion with the nutrient intake. 5. The preference of snacks marks a direct proportion with all kinds of nutrients intake except for the vitamin A, and vitamin C.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.19 no.3
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• pp.334-342
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• 2012

Purpose: This descriptive study was done to identify the academic achievement, self-directed learning (SDL), and critical thinking disposition (CTD) of nursing students according to their learning styles. Method: The participants were 240 nursing students. Data were collected using structured questionnaires which included Kolb's Learning Style Inventory, Academic Achievement in Fundamental Nursing and Health Assessment, Self Directed Learning Readiness Scale, and California Critical Thinking Disposition Inventory. Data were analyzed using ${\chi}^2$ test, ANOVA, Pearson' correlation coefficients, and Spearman rank correlation coefficient. Results: One third of respondents were shown to be Convergers in their learning style (33.3%). The Academic Achievement of students who were Convergers was significantly higher than those who were Divergers or Accommodators (F=5.95, p=.001). The SDL and CTD of students who were Convergers were significantly higher than Divergers and Assimilators (F=9.67, p<.001 and F=8.42, p<.001). No significant correlations were found between Academic Achievement and SDL or CTD, but a statistically significant positive correlation was found between SDL and CTD (r=.68, p<.001). Conclusion: The findings of this study indicate that learning style influences academic achievement, SDL and CTD.

• Environmental Mutagens and Carcinogens
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• v.20 no.1
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• pp.34-39
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• 2000

Although shipbuilding workers were exposed to a variety of genotoxic compounds including polycyclic aromatic hydrocarbons (PAHs), limited number of studies were conducted to evaluate the biomarkers related to PAH exposure in painting workers in shipbuilding industry. One hundred and thirty three workers including 73 employees using coal tar paints were recruited from a shipbuilding company located in South Korea. Urinary 1-hydroxypyrene glucuronide (1-OHPG), as internal dose of PAH exposure, were measured by synchronous fluorescence spectroscopy after immunoaffinity purification using monoclonal antibody 8E11. Glutathione S-transferase (GST)M1 and GSTT1 genotypes were assessed by multiplex PCR. Information on demographic characteristics, smoking gabit, diet, job title, use of personal protective equipments were collected by self-administered questionnaire. Urinary 1-OHPG were higher in workers using coal tar paints than in workers using general paints, however, the difference was not statistically significant (p=0.20, Mann-Whitney U test). Urinary 1-OHPG levels in smokers were higher than in non-smokers (p<0.05 by Mann-Whitney U test) and there was a significant increase in urinary 1-OHPG levels with the numbers of cigarettes consumed per day (Spearman's correlation coefficient = 0.28, p=0.02). Genetic polymorphisms of GSTM1 and GSTT1 did not influence the level of 1-OHPG in study subjects. Multiple regression analysis show that smoking is the only significant predictor for lon-transformed 1-OHPG (overall model R2=0.1). These results suggest that workers using coal tar paints were exposed to significant amount of PAHs and individual difference in xenobiotic metabolism might affect the levels of internal dose of PAHs.

• Journal of the Korean Data and Information Science Society
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• v.27 no.4
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• pp.1035-1046
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• 2016

This study was performed to identify the relationship between sense of humor, stress, and depression in the nursing students. Data were collected from the 20th of June to the 30th of June in 2015 from 227 nursing students in K university. The collected data were analyzed using frequency, percentage, average, standard deviation, independent t-test, one-way ANOVA, kruscal-walis, pearson, spearman, and rank correlation coefficient. The result shows the sense of humor was significantly different between grade (t=-3.814, p <.001) and major satisfaction (${\chi}^2=12.070$, p=.007). The sense of humor was negatively correlated with living stress (r=-.237, p=.001), clinical based stress (r=-.182, p=.007), and with depression (r=-.238, p<.001). This data suggests that sense of humor is relevant in reducing the living stress and clinical based stress. These findings can provide the basis for the development of nursing intervention to increase the ability to cope with stress and depression.

• Journal of Korean Academy of Nursing
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• v.46 no.1
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• pp.29-38
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• 2016

Purpose: The Perinatal Post-Traumatic Stress Disorder Questionnaire (PPQ) was designed to measure post-traumatic symptoms related to childbirth and symptoms during postnatal period. The purpose of this study was to develop a translated Korean version of the PPQ and to evaluate reliability and validity of the Korean PPQ. Methods: Participants were 196 mothers at one to 18 months after giving childbirth and data were collected through e-mails. The PPQ was translated into Korean using translation guideline from World Health Organization. For this study Cronbach's alpha and split-half reliability were used to evaluate the reliability of the PPQ. Exploratory Factor Analysis (EFA), Confirmatory Factor Analysis (CFA), and known-group validity were conducted to examine construct validity. Correlations of the PPQ with Impact of Event Scale (IES), Beck Depression Inventory II (BDI-II), and Beck Anxiety Inventory (BAI) were used to test a criterion validity of the PPQ. Results: Cronbach's alpha and Spearman-Brown split-half correlation coefficient were 0.91 and 0.77, respectively. EFA identified a 3-factor solution including arousal, avoidance, and intrusion factors and CFA revealed the strongest support for the 3-factor model. The correlations of the PPQ with IES, BDI-II, and BAI were .99, .60, and .72, respectively, pointing to criterion validity of a high level. Conclusion: The Korean version PPQ is a useful tool for screening and assessing mothers' experiencing emotional distress related to child birth and during the postnatal period. The PPQ also reflects Post Traumatic Stress Disorder's diagnostic standards well.

• The korean journal of orthodontics
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• v.46 no.5
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• pp.323-330
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• 2016

Objective: The purpose of this study was to determine whether the results of fractal analysis can be used as criteria for midpalatal suture maturation evaluation. Methods: The study included 131 subjects aged over 18 years of age (range 18.1-53.4 years) who underwent cone-beam computed tomography. Skeletonized images of the midpalatal suture were obtained via image processing software and used to calculate fractal dimensions. Correlations between maturation stage and fractal dimensions were calculated using Spearman's correlation coefficient. Optimal fractal dimension cut-off values were determined using a receiver operating characteristic curve. Results: The distribution of maturation stages of the midpalatal suture according to the cervical vertebrae maturation index was highly variable, and there was a strong negative correlation between maturation stage and fractal dimension (-0.623, p < 0.001). Fractal dimension was a statistically significant indicator of dichotomous results with regard to maturation stage (area under curve = 0.794, p < 0.001). A test in which fractal dimension was used to predict the resulting variable that splits maturation stages into ABC and D or E yielded an optimal fractal dimension cut-off value of 1.0235. Conclusions: There was a strong negative correlation between fractal dimension and midpalatal suture maturation. Fractal analysis is an objective quantitative method, and therefore we suggest that it may be useful for the evaluation of midpalatal suture maturation.