Publications by authors named "Ji Sun Choi"

Background: With the importance of nursing leadership roles, there is a need for a more integrated approach to nursing leadership that can adapt quickly to many challenges in today's healthcare environments. In recent years, integral leadership that can apply a more holistic and inclusive approach to leadership has gained growing attention in other disciplines. However, research on integral leadership in nursing is sparse since no instrument specifically measuring integral leadership in nursing contexts is available.

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Aims: To identify specific patterns of lifestyle behaviours among young adults and examine the relationships of the patterns to sociodemographic characteristics and health conditions (hypertension, diabetes and obesity).

Design: Descriptive, correlational study.

Methods: Data from a nationally representative sample of 4562 young adults aged 19-39, who participated in the 2016-2018 Korea National Health and Nutrition Examination Survey, were analysed.

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Both neuronal and genetic mechanisms regulate brain function. While there are excellent methods to study neuronal activity in vivo, there are no nondestructive methods to measure global gene expression in living brains. Here, we present a method, epigenetic MRI (eMRI), that overcomes this limitation via direct imaging of DNA methylation, a major gene-expression regulator.

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Background: Although a general implementation of person-centered care in Korean long-term care delivery systems would be challenging, person-centered care has the potential to improve resident and staff outcomes through changes in current care services. However, little empirical evidence currently supports a positive relationship between person-centered care environments and staff outcomes.

Purpose: This study was designed to examine the relationship between person-centered care environments and staff outcomes, including job satisfaction and turnover intention, among care staff in Korean long-term care facilities.

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Person-centered care is widely recognized as a promising practice to improve patient care quality. However, little is known about the competencies of nursing students who are essential to providing high-quality person-centered care. In this study, relevant attributes, including professional nursing competence, empathy, and self-awareness, were examined in relation to person-centered care competence among South Korean nursing students while controlling for individual characteristics, including age, gender, religion, and academic performance.

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Background: Despite growing recognition of person-centered care as an essential component of quality care, little is known about how person-centered care can be implemented in the provision of care services and how it is empirically related to outcomes in the rehabilitation settings.

Objectives: To investigate the extent of implementation of the person-centered care in rehabilitation practices, as well as its effects on relevant outcomes.

Design: Systematic literature review.

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A major challenge to experimental studies and therapeutic uses of hematopoietic stem cells (HSC) is the limited options for analytical tools that can reliably resolve functional differences in heterogeneous HSC subpopulations at the single cell level. Currently available methods require the use of external labels and/or separate clonogenic and transplantation assays to identify bona fide stem cells, necessitating the harvest of bulk cell populations and long incubation times that obscure how individual HSCs dynamically respond to exogenous and endogenous stimuli. In this study, we employ Raman spectroscopy to noninvasively resolve the dynamics of individual differentiating hematopoietic progenitor cells during the course of neutrophilic differentiation.

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Purpose: To examine nurse working conditions and outcomes (job satisfaction, intent to stay, and RN-rated quality of care) among registered nurses (RNs) with different perceptions of patient assignments.

Design And Methods: A descriptive study was conducted using data from 106,439 RNs in 751 acute care hospitals that participated in the National Database of Nursing Quality Indicators (NDNQI ) RN Survey. To compare the nurse working conditions and three outcomes by the two RN groups on perceptions of patient assignment, chi-square and t tests were performed with Stata version 14.

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Purpose: To investigate the relationships between registered nurses' (RNs') perceptions of the culture of patient safety in their workplace and their patient safety competency-attitudes, skills, and knowledge.

Design: A cross-sectional study design was used. Data were collected by using a self-reported survey from 343 RNs working in a university hospital in Seoul, South Korea.

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Focal adhesions are critical cell membrane components that regulate adhesion and migration and have cluster dimensions that correlate closely with adhesion engagement and migration speed. We utilized a label-free approach for dynamic, long-term, quantitative imaging of cell-surface interactions called photonic resonator outcoupler microscopy (PROM) in which membrane-associated protein aggregates outcoupled photons from the resonant evanescent field of a photonic crystal biosensor, resulting in a highly localized reduction of the reflected light intensity. By mapping the changes in the resonant reflected peak intensity from the biosensor surface, we demonstrate the ability of PROM to detect focal adhesion dimensions.

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Purpose: This study aimed to identify latent classes based on major modifiable risk factors for coronary artery disease.

Methods: This was a secondary analysis using data from the electronic medical records of 2,022 patients, who were newly diagnosed with coronary artery disease at a university medical center, from January 2010 to December 2015. Data were analyzed using SPSS version 20.

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Purpose: The purpose of this concept analysis was to clarify the meaning and the attributes of traditional Korean (Hanbang) nursing.

Data Source: Data sources include Academic Search Complete, Allied and Complementary Medicine Database, EBSCOhost, PubMed, MEDLINE, and Research Information Sharing Service.

Data Synthesis: We used Walker and Avant's method to analyze the concept of Hanbang nursing.

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Adhesion is a critical cellular process that contributes to migration, apoptosis, differentiation, and division. It is followed by the redistribution of cellular materials at the cell membrane or at the cell-surface interface for cells interacting with surfaces, such as basement membranes. Dynamic and quantitative tracking of changes in cell adhesion mass redistribution is challenging because cells are rapidly moving, inhomogeneous, and nonequilibrium objects, whose physical and mechanical properties are difficult to measure or predict.

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Hematopoiesis is the physiological process where hematopoietic stem cells (HSCs) continuously generate the body's complement of blood and immune cells within unique regions of the bone marrow termed niches. Although previous investigations have revealed gradients in cellular and extracellular matrix (ECM) content across the marrow, and matrix elasticity and ligand type are believed to be strong regulators of stem cell fate, the impact of biophysical signals on HSC response is poorly understood. Using marrow-inspired ECM ligand-coated polyacrylamide substrates that present defined stiffness and matrix ligand cues, we demonstrate that the interplay between integrin engagement and myosin II activation processes affects the morphology, proliferation, and myeloid lineage specification of primary murine HSCs within 24 hours ex vivo.

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Objective: The aim of this study was to investigate the perceptions of RNs on the implementation of safe patient handling and mobility (SPHM) programs in states with and without SPHM legislation.

Background: Despite numerous strategies developed to reduce caregiver injuries, nurses are still experiencing work-related musculoskeletal injuries. A comprehensive SPHM program has been found to be effective in reducing patient handling injuries among nurses.

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In our body, stem cells reside in a microenvironment termed the niche. While the exact composition and therefore the level of complexity of a stem cell niche can vary significantly tissue-to-tissue, the stem cell niche microenvironment is dynamic, typically containing spatial and temporal variations in both cellular, extracellular matrix, and biomolecular components. This complex flow of secreted or bound biomolecules, cytokines, extracellular matrix components, and cellular constituents all contribute to the regulation of stem cell fate specification events, making engineering approaches at the nano- and micro-scale of particular interest for creating an artificial niche environment in vitro.

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Pulmonary Langerhans cell histiocytosis is an uncommon diffuse cystic lung disease in adults. In rare cases, it can involve extrapulmonary organs and lead to endocrine abnormalities such as central diabetes insipidus. A 42-year-old man presented with polyphagia and polydipsia, as well as a dry cough and dyspnea on exertion.

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A major challenge for expanding specific types of hematopoietic cells ex vivo for the treatment of blood cell pathologies is identifying the combinations of cellular and matrix cues that direct hematopoietic stem cells (HSC) to self-renew or differentiate into cell populations ex vivo. Microscale screening platforms enable minimizing the number of rare HSCs required to screen the effects of numerous cues on HSC fate decisions. These platforms create a strong demand for label-free methods that accurately identify the fate decisions of individual hematopoietic cells at specific locations on the platform.

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Hematopoietic stem cells (HSCs) play a crucial role in the generation of the body's blood and immune cells. This process takes place primarily in the bone marrow in specialized 'niche' microenvironments, which provide signals responsible for maintaining a balance between HSC quiescence, self-renewal, and lineage specification required for life-long hematopoiesis. While our understanding of these signaling mechanisms continues to improve, our ability to engineer them in vitro for the expansion of clinically relevant HSC populations is still lacking.

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Background: Transbronchial lung biopsy (TBLB) is a valuable diagnostic tool for peripheral pulmonary lesions. The diagnostic yield of TBLB reportedly ranges from 41%-60%. Many studies demonstrated the various factors that influence the yield of TBLB, including size, location, and distance from the carina or pleura.

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This study investigates the clinical nature, prevalence rates, and associated factors of second-generation antipsychotic (SGA)-related tardive dyskinesia and tardive dystonia. To date, these subjects have not been thoroughly investigated.The subjects were 80 non-elderly schizophrenic patients who received SGAs for more than 1 year without any previous exposure to first-generation antipsychotics.

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We demonstrate photonic crystal enhanced fluorescence (PCEF) microscopy as a surface-specific fluorescence imaging technique to study the adhesion of live cells by visualizing variations in cell-substrate gap distance. This approach utilizes a photonic crystal surface incorporated into a standard microscope slide as the substrate for cell adhesion, and a microscope integrated with a custom illumination source as the detection instrument. When illuminated with a monochromatic light source, angle-specific optical resonances supported by the photonic crystal enable efficient excitation of surface-confined and amplified electromagnetic fields when excited at an on-resonance condition, while no field enhancement occurs when the same photonic crystal is illuminated in an off-resonance state.

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Background: The hospital nursing practice environment has been found to be crucial for better nurse and patient outcomes. Yet little is known about the professional nursing practice environment at the unit level where nurses provide 24-hour bedside care to patients.

Objectives: To examine differences in nursing practice environments among 11 unit types (critical care, step-down, medical, surgical, combined medical-surgical, obstetric, neonatal, pediatric, psychiatric, perioperative, and emergency) and by Magnet status overall, as well as four specific aspects of the practice environment.

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Background: Various staffing measures have been used in examining the relationship between nurse staffing and patient outcomes. Little research has been conducted to compare these measures based on their explanatory power as predictors of nursing-sensitive outcomes. In this study, both administrative and nurse-reported measures were examined.

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Although nursing care hours (NCH) is commonly used to examine factors related to adverse events among inpatients, the reliability of the NCH measure has rarely been examined. This study assessed the reliability of NCH data from the National Database of Nursing Quality Indicators® by estimating intraclass correlation coefficients (ICCs) with data from the California Office for Statewide Health Planning and Development. Hospital-level aggregated NCH data for critical care units were linked from each of the databases for 48 California hospitals matched in the two databases.

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