PURPOSE: The aim of this study was to examine the mediating effect of self-efficacy in the relationship of physical and psychological symptoms to exercise adherence in patients with heart failure. METHODS: The participants in this study were 186 patients with heart failure in two hospitals located in Busan. The measures included questions about general and disease characteristics, physical symptoms, psychological symptoms, self-efficacy for exercise, and exercise adherence. Data were analyzed using t-test, ANOVA, Pearson correlation coefficients, simple and multiple regression using Baron and Kenny steps for mediation. RESULTS: There were significant differences in age, gender and comorbidity on exercise adherence. There were also significant correlations among physical and psychological symptoms, self-efficacy for exercise, and exercise adherence. Self-efficacy for exercise showed partial mediating effects in the relationship between physical symptoms and exercise adherence. CONCLUSION: Based on the findings of this study, the enhancement of self-efficacy for exercise may positively affect the exercise compliance of the patients with health failure, even while they are experiencing physical symptoms. Therefore, it is necessary to develop effective strategies to enhance self-efficacy for exercise.
Busan ; Comorbidity ; Compliance ; Heart Failure ; Heart ; Humans ; Negotiating

Progressively transformed germinal centers (PTGC) is a benign process characterised by a morphological variant of reactive follicular hyperplasia in lymph nodes. It was recently shown that some cases of PTGC are associated with IgG4-related disease (IgG4-RD) or increased IgG4 plasma cells. Five years ago, a 57-year-old woman presented with enlargement of multiple lymph nodes in the left parotid, submandibular, and neck areas, pathologically diagnosed as PTGC after excisional biopsy. Since then, she has experienced numbness in her extremities, especially the left shoulder and arm, pruritus on the left side of the face and intermittent facial palsy, for which she has been receiving regular symptomatic treatment. Recently the patient developed diabetes mellitus (approximately seven months ago). In routine follow-up scans, a mass was detected in left kidney and magnetic resonance imaging of the abdomen prior to surgery revealed a slightly enhanced bulky mass replacing the pancreatic tail and uncinate process. The mass in left kidney was diagnosed as clear cell renal cell carcinoma, and the pathological features of the pancreatic lesion were those of IgG4-related chronic fibrosing pancreatitis. Retrograde examination of the neck lymph node diagnosed as PTGC showed increased deposition of IgG4-positive plasma cells.

PURPOSE: The purpose of this study was to investigate gender related factors that influence regular exercise adherence in patients with coronary artery disease. METHODS: This secondary analysis study used data from the 2013~2015 Korea National Health and Nutrition Examination Survey (KNHANES). Three hundred and eighty patients over 20 years of age and having coronary artery disease were selected for this study. Measures included questions about regular exercise, general characteristics, health behaviors, and health status. Data were analyzed using descriptive analysis, Rao-Scott χ² statistic, and multiple logistic regression analysis with the SPSS 21.0 program. RESULTS: The results were as follows. Men did more regular exercise than women (58.8% vs 40.1%). The multivariate-adjusted Odds Ratios (OR) for regular exercise adherence in men were 2.93 (95% CI: 1.39~6.17) for non smokers and 3.06 (95% CI: 1.53~6.13) for men with 0 to 1 comorbidities. Women had a high odds ratios of 0.38 (95% CI: 0.18~0.82) for not using alcohol and 2.10 (95% CI: 1.03~4.29) for no back pain. CONCLUSION: To improve regular exercise adherence in patients with coronary artery disease, it is necessary to develop different approaches considering gender.
Back Pain ; Comorbidity ; Coronary Artery Disease* ; Coronary Vessels* ; Female ; Health Behavior ; Humans ; Korea* ; Logistic Models ; Male ; Nutrition Surveys* ; Odds Ratio

The aim of this study is to determine whether the 65 competencies, defined in “the role of Korean doctor, 2014”, are suitable for basic medical education phase in Korea. It seeks to analyze the gap among the educational reality and expectation, assessment situation of the competencies above. We also try to define issues of the development, application and assessment phases of competency-based medical education (CBME) at individual medical schools. We designed survey tools based on the Miller's assessment pyramid (knowledge, explanation, demonstration, and performance) for each of the 65 competencies. The survey distributed to 41 medical schools in April 2015 and 38 replies were received (92.7%). Competencies that matched both the educational reality and expectation were numbers 1 (patient care), 33 (social accountability), and 49 (professionalism). However, all the other competencies ranked lower in current status than that of desirable level. 54 out of 65 competencies (83.07%) remained at the knowledge and explanation level when each competence were assessed. In the development, application, and assessment phases of CBME, common issues that medical schools commonly noted were difficulty linking competencies to curriculum preparation and student assessment, the lack of faculty's understanding, difficulty to reach consensus among faculties, and absence of teaching and learning methods and assessment tools that fits CBME. For the successful settle down of CBME, there is a need for efforts to develop the model of graduate outcomes, to share information and experience, and to operate faculty development program by the medical education communities.
Consensus ; Curriculum ; Education, Medical ; Humans ; Korea ; Learning ; Mental Competency ; Needs Assessment ; Schools, Medical

Epstein-Barr virus (human herpesvirus-4) is very common virus that can be detected in more than 95% of the human population. Most people are asymptomatic and live their entire lives in a chronically infected state (IgG positive). However, in some populations, the Epstein-Barr virus (EBV) has been involved in the occurrence of a wide range of B-cell lymphoproliferative disorders (LPDs), including Burkitt lymphoma, classic Hodgkin’s lymphoma, and immune–deficiency associated LPDs (post-transplant and human immunodeficiency virus–associated LPDs). T-cell LPDs have been reported to be associated with EBV with a subset of peripheral T-cell lymphomas, angioimmunoblastic T-cell lymphomas, extranodal nasal natural killer/T-cell lymphomas, and other rare histotypes. This article reviews the current evidence covering EBV-associated LPDs based on the 2016 classification of the World Health Organization. These LPD entities often pose diagnostic challenges, both clinically and pathologically, so it is important to understand their unique pathophysiology for correct diagnoses and optimal management.
B-Lymphocytes ; Burkitt Lymphoma ; Classification* ; Diagnosis ; Herpesvirus 4, Human ; Humans ; Lymphoma ; Lymphoma, T-Cell ; Lymphoma, T-Cell, Peripheral ; Lymphoproliferative Disorders* ; T-Lymphocytes ; World Health Organization

OBJECTIVETo assess the effects of traditional herbal formulae Sijunzi Decoction (, Sagunja-tang, SJZD), Siwu Decoction (, Samul-tang, SWD), Bawu Decoction (, Palmul-tang, BWD) and Shiquan Dabu Decoction (, Sipjeondaebo-tang, SDD) on the activities of human cytochrome P450 (CYP450), a drug-metabolizing enzyme.

METHODSHerbal formula water extracts were filtered and lyophilized after the powder extracts were dissolved in distilled water. The activities of major human CYP450 isozymes (CYP3A4, CYP2C19, CYP2D6 and CYP2E1) were measured using in vitro fluorescence-based enzyme assays. The inhibitory effects of the herbal formulas on the activities of CYP450 were characterized as half maximal inhibition concentration (IC) values.

RESULTSAll the tested herbal formulae inhibited CYP2C19 activity (IC: SJZD, 83.28 μg/mL; SWD, 235.54 μg/mL; BWD, 166.82 μg/mL; SDD, 178.19 μg/mL); SJZD (IC= 196.46 μg/mL), SWD (IC= 333.42 μg/mL) and SDD (IC= 163.42 μg/mL) inhibited CYP2E1-mediated metabolism; whereas BWD exhibited comparatively weak inhibition of CYP2E1 (IC= 501.78 μg/mL). None of the four herbal formulas significantly affected CYP3A4 or CYP2D6.

CONCLUSIONSThese results suggest that SJZD, SWD, BWD and SDD could potentially inhibit the metabolism of co-administered synthetic drugs whose primary route of elimination is via CYP2C19. In addition, clinically relevant pharmacokinetic interactions could occur when SJZD, SWD or SDD is co-administered with drugs metabolized by CYP2E1. Our findings provide information for the safety and effective clinical use of these four classic herbal formulas.

Cytochrome P-450 Enzyme System ; metabolism ; Drugs, Chinese Herbal ; pharmacology ; Hot Temperature ; Humans ; Inhibitory Concentration 50 ; Isoenzymes ; metabolism ; Plant Extracts ; pharmacology ; Water ; chemistry

BACKGROUND: There is subjective disagreement regarding nuclear clearing in papillary thyroid carcinoma. In this study, using digital instruments, we were able to quantify many ambiguous pathologic features and use numeric data to express our findings. METHODS: We examined 30 papillary thyroid carcinomas. For each case, we selected representative cancer cells showing clear nuclei and surrounding non-neoplastic follicular epithelial cells and evaluated objective values of green light intensity (GLI) for quantitative analysis of nuclear clearing in papillary thyroid carcinoma. RESULTS: From 16,274 GLI values from 600 cancer cell nuclei and 13,752 GLI values from 596 non-neoplastic follicular epithelial nuclei, we found a high correlation of 94.9% between GLI and clear nuclei. GLI between the cancer group showing clear nuclei and non-neoplastic follicular epithelia was statistically significant. The overall average level of GLI in the cancer group was over two times higher than the non-neoplastic group despite a wide range of GLI. On a polygonal line graph, there was a fluctuating unique difference between both the cancer and non-neoplastic groups in each patient, which was comparable to the microscopic findings. CONCLUSIONS: Nuclear GLI could be a useful factor for discriminating between carcinoma cells showing clear nuclei and non-neoplastic follicular epithelia in papillary thyroid carcinoma.
Carcinoma, Papillary* ; Cell Nucleus ; Epithelial Cells ; Humans ; Image Processing, Computer-Assisted ; Thyroid Gland* ; Thyroid Neoplasms*

PURPOSE: The purpose of this study was to identify the levels of customer orientation in nurses whose work experience was between 1 and 5 years and to examine factors associated with customer orientation and nursing productivity. METHODS: For this descriptive correlational study, nurses (N=164) were recruited from a University Hospital in B city, from November 1 to 23, 2012. Questionnaires included measures of customer orientation, nursing productivity, organizational commitment, job stress, and turnover intention. Data were analysed with the SPSS/WIN 18.0 program using descriptive statistics, t-test, ANOVA, Pearson correlation coefficient, and stepwise multiple regression. RESULTS: The mean age of participants was 25 years, 96% were single, and 54.9% had a bachelor degree. Organizational commitment (beta=.387) and job stress (beta=.280) significantly explained the variance in customer orientation (R2=15.8). Customer orientation (beta=.479), education level (beta=.196), and turnover intention (beta=-.184) significantly explained the variance in nursing productivity (R2=35.3). Customer orientation was the most important factor in explaining the variance in the nursing productivity. CONCLUSION: This study highlighted the relationship between customer orientation and nursing productivity. Improving the customer orientation could result in increasing nursing productivity. Future managerial intervention to improve customer orientation is warranted.
Education ; Efficiency* ; Efficiency, Organizational ; Intention ; Nursing* ; Surveys and Questionnaires

BACKGROUND: Childhood cancer survivors have been reported to have an increased risk of prevalence of metabolic syndrome compared to the normal population. The purpose of this study was to investigate the prevalence of the components of metabolic syndrome in childhood cancer survivors in a single institute.METHODS: The study included survivors who had survived for at least 5 years after off chemotherapy without evidence of recurrence. We measured body mass index (BMI), triglycerides (TG), high-density lipoprotein (HDL)-cholesterol, systolic and diastolic blood pressure, and fasting glucose.RESULTS: We investigated 58 childhood cancer survivors, median age 5.4 years (range, 0.1-17.2 years) at diagnosis and median follow-up time elapsed after off chemotherapy 7.4 years (range, 4.7-18.6 years). The frequency of metabolic syndrome was 3.4%. The prevalence of each component was: obesity, 17.2%; elevated TG level, 46.6%; low HDL cholesterol, 34.5%; elevated blood pressure, 1.7%; and elevated fasting glucose, 9.3%, respectively. Sixty nine percentage of survivors had at least 1 abnormal component of metabolic syndrome. The increased TG level was found more frequently in obese subjects than normal weight subjects.CONCLUSION: We observed the high incidence of increased TG level in childhood cancer survivors. It is necessary to be closely monitored the components of metabolic syndrome in childhood cancer survivors, in order to prevent them from cardiovascular diseases and improve their health outcomes.
Blood Pressure ; Body Mass Index ; Cardiovascular Diseases ; Cholesterol, HDL ; Diagnosis ; Drug Therapy ; Fasting ; Follow-Up Studies ; Glucose ; Humans ; Incidence ; Lipoproteins ; Obesity ; Prevalence ; Recurrence ; Survivors ; Triglycerides

BACKGROUND: The aim of study was to determine the relative frequency of malignant lymphoma according to World Health Organization (WHO) classification in Korea. METHODS: A total of 3,998 cases diagnosed at 31 institutes between 2005 and 2006 were enrolled. Information including age, gender, pathologic diagnosis, site of involvement and immunophenotypes were obtained. RESULTS: The relative frequency of non-Hodgkin lymphoma (NHL) and Hodgkin lymphoma (HL) was 95.4% and 4.6%, respectively. B-cell lymphomas accounted for 77.6% of all NHL, while T/natural killer (T/NK)-cell lymphomas accounted for 22.4%. The most frequent subtypes of NHL were diffuse large B-cell lymphoma (42.7%), extranodal marginal zone B-cell lymphoma (MZBCL) of mucosa-associated lymphoid tissue (19.0%), NK/T-cell lymphoma (6.3%) and peripheral T-cell lymphoma (PTCL), unspecified (6.3%), in decreasing order. The relative frequency of HL was nodular sclerosis (47.4%), mixed cellularity (30.6%), and nodular lymphocyte predominant (12.1%) subtypes. Compared with a previous study in 1998, increase in gastric MZBCL and nodular sclerosis HL, and slight decrease of follicular lymphoma, PTCL, and NK/T-cell lymphoma were observed. CONCLUSIONS: Korea had lower rates of HL and follicular lymphoma, and higher rates of extranodal NHL, extranodal MZBCL, and NK/T-cell lymphoma of nasal type compared with Western countries. Changes in the relative frequency of lymphoma subtypes are likely ascribed to refined diagnostic criteria and a change in national health care policy.
Academies and Institutes ; Delivery of Health Care ; Hodgkin Disease ; Korea ; Lymphocytes ; Lymphoid Tissue ; Lymphoma ; Lymphoma, B-Cell ; Lymphoma, B-Cell, Marginal Zone ; Lymphoma, Follicular ; Lymphoma, Non-Hodgkin ; Lymphoma, T-Cell, Peripheral ; Sclerosis ; World Health Organization