Yong Il Hwang

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BACKGROUND AND OBJECTIVE Because the mortality and social burden associated with COPD is increasing, repeated surveys of the prevalence of COPD have been used to assess risk factors, detect potential patients, and establish early diagnoses and management protocols. We report the prevalence of spirometrically detected COPD in Korea in 2008, using data from(More)
This study was conducted to investigate the association between the chronic obstructive pulmonary disease (COPD) assessment test (CAT) and depression in COPD patients. The Korean versions of the CAT and patient health questionnaire-9 (PHQ-9) were used to assess COPD symptoms and depressive disorder, respectively. In total, 803 patients with COPD were(More)
INTRODUCTION Limited data are available regarding the diagnostic and prognostic utility of brain natriuretic peptide (BNP) in patients with chronic kidney disease (CKD) in the intensive care unit (ICU) setting. METHODS All patients with CKD and a serum creatinine (Cr) of 2.0 mg/dl or higher admitted to the ICU between January 2006 and September 2007 were(More)
Purpose: Inconclusive results from com puted tom ography (CT)-guided transthoracic needle aspiration and biopsy (TNAB) performed for lung lesions presents a clinical dilemm a. The purpose of this study was to determ ine the factors affecting an inconclusive result from a CT guided TNAB, and to evaluate the final outcomes of these inconclusive results.(More)
Antiphospholipid (aPL)/anti-β(2) glycoprotein I (anti-β(2)GPI) antibodies stimulates tissue factor (TF) expression within vasculature and in blood cells, thereby leading to increased thrombosis. Several cellular receptors have been proposed to mediate these effects, but no convincing evidence for the involvement of a specific one has been provided. We(More)
BACKGROUND Early detection of drug-resistant Mycobacterium tuberculosis is important for the control and prevention of disease transmission. However, conventional drug susceptibility tests for drug-resistant M tuberculosis take at least 3 to 8 weeks. Here, we report the clinical efficacy of direct DNA sequencing analysis for detecting drug-resistant TB on(More)
Many pneumococcal capsular polysaccharides (PSs) are similar in structure, and a pneumococcal antibody often binds to all of the PSs with a similar structure. Yet, these cross-reactive antibodies may bind to the structurally related pneumococcal capsular PSs with an avidity too low to be effective. If memory B cells producing such weakly cross-reactive(More)
BACKGROUND The objective of this study was to assess the validity and reliability of the Korean version of chronic obstructive pulmonary disease assessment test (CAT) and Dyspnea-12 Questionnaire for patients with bronchiectasis or tuberculous destroyed lung. METHODS For 62 bronchiectasis patients and 37 tuberculous destroyed lung patients, 3(More)
The aim of the study was to evaluate the prevalence of restrictive ventilatory defect and to determine the risk factors in subjects with spirometrically-defined restrictive ventilatory defect. We used the population-based, fourth-2, 3 (2008, 2009) and fifth (2010-2012) Korea National Health and Nutrition Examination Survey (KNHANES) to analyze 15,073(More)