• Communications for Statistical Applications and Methods
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• v.23 no.1
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• pp.1-20
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• 2016

Causal inference methodologies have been developed for the past decade to estimate the unconfounded effect of an exposure under several key assumptions. These assumptions include, but are not limited to, the stable unit treatment value assumption, the strong ignorability of treatment assignment assumption, and the assumption that propensity scores be bounded away from zero and one (the positivity assumption). Of these assumptions, the first two have received much attention in the literature. Yet the positivity assumption has been recently discussed in only a few papers. Propensity scores of zero or one are indicative of deterministic exposure so that causal effects cannot be defined for these subjects. Therefore, these subjects need to be removed because no comparable comparison groups can be found for such subjects. In this paper, using currently available causal inference methods, we evaluate the effect of arbitrary cutoffs in the distribution of propensity scores and the impact of those decisions on bias and efficiency. We propose a tree-based method that performs well in terms of bias reduction when the definition of positivity is based on a single confounder. This tree-based method can be easily implemented using the statistical software program, R. R code for the studies is available online.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.12
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• pp.300-309
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• 2017

This study was conducted to investigate the mediated effects of self-efficacy in relation to communication competency within the medical team and turnover intention of hospital nurses. Data were collected from 208 nurses working at two university hospitals. In analyzing data using SPSS/WIN 23.0 program, descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient and after analyzed with Multiple regression analysis using Baron & Kenny's 3 stage procedure, confirmed indirect effect with Sobel test. Evaluation of relationships among communication competency, turnover intention and self-efficacy of subjects revealed a negative relationship(r=-0.22, p=0.001) between communication competency and turnover intention, a positive relationship(r=0.61, p<0.001) between communication competency and self-efficacy and a negative relationship(r=-0.25, <0.001) between self-efficacy and turnover intention. Concerning the mediated effect of self-efficacy in the relationship between communication competency and turnover intention, the influence of communication competency at stage 1 on turnover intention was significant(${\beta}=-0.22$, p<0.001), but communication competency at stage 3 had no significant influence on turnover intention(${\beta}=-0.11$, p=0.194). Accordingly, the mediated effect of self-efficacy in the relationship between communication competency and turnover intention fully mediated and the mediated effect of self-efficacy was significant(z=-2.15, p=0.032). Heightening self-efficacy by improving communication competency could effectively reduce the turnover intention of nurses.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.12
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• pp.8767-8775
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• 2015

The purpose of this study was to identify the relationship of career-related stress, commitment to a career choice and career decision self-efficacy of college students. The participants were 293 college students in P city. Data were collected by using self-report questionnaires from May 6 to 29, 2015. Data were analyzed with descriptive statistics, t-test, ANOVA, Pearson,s correlation coefficient and Hierarchical regression analysis by SPSS/WIN 23.0 program. The career-related stress was negatively correlated with commitment to a career choice (r=-.731, p<.001) and career decision self-efficacy(r=-.449, p<.001). The influencing factors of career-related stress were grade(${\beta}$=.99, p<.017) and commitment to a career choice(${\beta}$=-.707, p<.001). This study concludes that it is necessary to develop education program to improve commitment to a career choice and career decision self-efficacy.

• Journal of Korean Academy of Nursing
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• v.40 no.1
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• pp.52-59
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• 2010

Purpose: This study was conducted to provide basic data for developing education and health promotion programs for the prevention of cancer by identifying the relation between optimistic bias about cancer and cancer preventive behavior in Korean, Chinese, American, and Japanese residents in Korea. Methods: Using a questionnaire administered by the researcher, data were collected from a convenience sample of 600, 19 to 64-yr-old male and female Korean, Chinese, American, and Japanese residents in Korea. Data was collected between February 6 and 28, 2009. Results: Scores for optimistic bias about cancer by nationality were: Koreans, -1.03; Chinese, -0.43; Americans, -0.23; and Japanese, 0.05. The cancer preventive behavior scores were: Koreans, 43.17; Chinese, 71.84; Americans, 71.71; and Japanese, 73.97. Optimistic bias about cancer and cancer preventive behavior showed a significantly positive correlation in all participants: Koreans (r=.223, p=.006); Chinese (r=.178, p=.029); Americans (r=.225, p=.006); and Japanese (r=.402, p<.001). Conclusion: The greater the optimistic bias about cancer is, the lower the cancer preventive behavior. The findings suggest that nursing interventions are needed to reduce optimistic bias about cancer and to form a positive attitude towards cancer prevention because an optimistic bias about cancer adversely affects cancer preventive behavior.

• Child Health Nursing Research
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• v.17 no.2
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• pp.69-73
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• 2011

Purpose: This study was designed to identify mother and infant related factors that influence child-care stress among the mother of newborn infants. Methods: Data were collected through self-administered questionnaires and descriptive statistics, correlation and multiple regression were used to analyze the data. The data survey was conducted with 957 conveniently selected mothers of infants when they visited a public health center in Seoul to have their children immunized. Results: The average item score for the Childcare Stress Inventory was 38.03, for the Edinburgh Postnatal Depression Scale, 9.31 and for the Degree of Bother Inventory, 23.42. The CSI was positively correlated to EPDS (r=.44, p<.001) and DBI (r=.40, p<.001). Also these two variables explained 30.0% of CSI in infants' mothers. Conclusion: These findings are expected to expand the understanding about postpartum mothers' child-care stress and can contribute to the development of comprehensive interventions based on community health nursing.

• Journal of Industrial Convergence
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• v.18 no.1
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• pp.109-118
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• 2020

Purpose: The purpose of this study was to investigate the effects of new nurse's resilience, emotional labor, and organizational socialization on clinical competence. Method: The subjects were 182 new nurses. The IBM SPSS 23.0 program was used for data analysis with the significance level set at .05. Results: Clinical competence was significantly different according to the number of nurses, hospitals where practiced, and nurse image (p <.05). Clinical competence showed a significant correlation with resilience (r = .50) and emotional labor (r = .62) (p <.001). Significant factors influencing clinical competence of new nurses were resilience(β = .567) and emotional labor(β = .332), with a total explanatory power of 50.5% (p <.001). Conclusion: There is a need for a program to improve the clinical competence of new nurses considering influencing factors.

• Journal of Industrial Convergence
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• v.20 no.4
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• pp.39-46
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• 2022

This descriptive survey study identified the factors influencing the abiliy of healthcare perceived by high school students. The survey was conducted from May 7, 2020, to Sep. 17, 2020 for 119 high school students in City D. SPSS WIN 22.0 program was used to for t-test and one-way ANOVA with Pearson's correlation coefficients and hierarchical regression analysis. The ability of healthcare perceived by high school students had a static correlation with the sub-domains of family function, that is, family cohesion(r=.65, p<.001) and family adaptability(r=.54, p<.001). For male students(β=.17, p=.012), those who reported a high level of perceived health status showed a high level of ability of healthcare(β=.25, p<.001). Significant influencing factors on high school students' health management ability were identified as gender (β=.17), their own health status perception (β=.23), and family cohesion (β=.45), and the explanatory power of the model was 50%. appear. Further research is hereby suggested for validation of the mediating role and effects of health care education programs to improve the family function perceived by high school students, encourage their practicing of health care management and help them to enter into healthy adulthood.

• The Journal of the Convergence on Culture Technology
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• v.9 no.6
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• pp.419-427
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• 2023

This study attempted to provide basic data for developing strategies to improve the multicultural efficacy of nursing university students by identifying the mediating effect of emotional intelligence on the relationship between multicultural perception and multicultural efficacy of nursing university students. The subjects of the study were 179 nursing students at two universities in J province and G city. The SPSS/23.0 program was used to analyze the data with descriptive statistics; an independent t-test, analysis of variance ANOVA, Pearson's correlation coefficient, and mediating effect analysis were performed using Process Macro 4.0. As a result of the study, nursing students multicultural efficacy was found to be positively correlated with multicultural awareness(r=.596, p<.001) and a positive correlation with emotional intelligence(r=.620, p<.001). Emotional intelligence showed a mediating effect on the relationship between multicultural perception and multicultural efficacy(β=.471, p<.001). Based on the results of this study, it is necessary to development and apply systematic programs to increase multicultural perception and increase emotional intelligence for improving the multicultural efficacy of nursing university students.

• The Journal of the Convergence on Culture Technology
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• v.9 no.6
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• pp.435-442
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• 2023

This study is a descriptive survey study to confirm the degree of depression, self-efficacy, life stress and smartphone addiction of nursing college students, and to identify their correlations and influencing factors. The study subjects had 15.85 points of depression, 3.19 points of self-efficacy, 2.47 points of life stress, and 39.23 points of smartphone addiction. As a result of analyzing smartphone addiction according to the general characteristics of the subjects, there was no statistically significant difference in grade and major, and there were significant differences in gender(t=-2.540, p=.014), grade(F=3.080, p=.029), smartphone importance(F=16.192, P<0.001), smartphone usage time (F=6.938, P<0.001). The subject's smartphone addiction showed a positive correlation with depression (r=.351, p<0.01), life stress (r=.321, p<.001), and self-efficacy (r=-.383, p<.001) showed a negative correlation. A negative correlation was found between depression and self-efficacy (r=-.529, p<.001), and a positive correlation was found between life stress (r=.568, p<.001). A negative correlation was found between self-efficacy and college life stress (r=-.434, p<.001). Self-efficacy appeared to be an influential factor in the subject's smartphone addiction. The goal is to provide basic data for programs and education to improve college students' self-efficacy.

• The Journal of Korean Academic Society of Nursing Education
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• v.22 no.3
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• pp.326-333
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• 2016

Purpose: The purpose of this study was to investigate the effect of parent-adolescent communication on academic stress and peer relationship perceived by high school students. Method: A total of 154 students were recruited from a high school in C city. Data were collected by means of self-reported questionnaires from September 1 to 18, 2015 and analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficients, and multiple regression analysis with SPSS 20.0. Results: Positive correlations were found between father-adolescent communication and peer relationship(r=.35, p<.001), and between mother-adolescent communication and peer relationship(r=.22, p=.006). Negative correlations were found between father-adolescent communication and academic stress (r=-.23, p=.004), and between mother-adolescent communication and academic stress(r=-.17, p=.039). Conclusion: These results suggest that identifying the effects of father-adolescent communication and parent-adolescent communication programs on academic stress and peer relationship is required.