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( Jae Yoon Jeong ),( Young Seo Cho ),( Jae Gon Lee ),( Sanghyeok Lim ),( Tae Yeob Kim ),( Seong Woo Nam ),( Joo Hyun Sohn ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: Sarcopenia and osteoporosis are frequent complications in patients with liver cirrhosis. The aim of this study was to investigate the prognostic impact of skeletal muscle mass and bone mineral density in these patients. Methods: We included retrospectively cirrhotic patients who underwent both computed tomography scans (CT) and hepatic venous pressure gradient (HVPG) measurement between December 2009 and March 2015. Single transverse CT image at the level of the third lumbar vertebra (L3) were used to evaluate skeletal muscle area, visceral and subcutaneous fat. The mean CT attenuation of the trabecular bone of the vertebral body in L4 (L4<sub>HU</sub>) was measured. Results: A total of 160 cirrhotic patients were enrolled. The mean age of the patients was 52.9 years with men predominating (n=116, 72.5%) and most of the cause was alcohol (62.5%). Forty-nine patients (30.6%) died during a median follow-up period of 39.6 months (range, 3.6-87.6). In multivariate analyses, HVPG (hazard ratio [HR] 1.069, 95% confidence interval [CI] 1.011-1.130; P=0.018), Model for End-Stage Liver Disease (MELD) scores (HR 1.081, 95% CI 1.014-1.153; P=0.018), presence of sarcopenia (HR 1.859, 95% CI 1.004- 3.443; P=0.049) and L4<sub>HU</sub> (HR 1.839 for L4<sub>HU</sub> < 145 HU, 95% CI 1.013-3.338; P=0.045) were independently associated with long term mortality. In patients with low MELD score (<10), HVPG (HR 1.161, 95% CI 1.040-1.296; P=0.008) and L4<sub>HU</sub> (HR 4.173 for L4<sub>HU</sub> < 145 HU, 95% CI 1.501-11.598; P=0.006) were independent predictors of mortality, but and presence of sarcopenia was not significant. Conclusions: Muscle mass and bone mineral density, together with the known MELD and HVPG, were associated with longterm prognosis in cirrhotic patients. Especially, in low MELD score, low bone mineral density was independently associated with long-term mortality. It is necessary to identify prognostic roles of liver-muscle-bone according to the degree of cirrhosis.
Jeong, Jae-Yeob,Kim, Choon-Sig,An, Hyun-Chul,Cho, Hyun-Seo,Choo, Gap-Chul The Ecological Society of Korea 2009 Journal of Ecology and Environment Vol.32 No.2
This study was carried out to evaluate litterfall dynamics in three adjacent coniferous tree plantations (larch: Larix leptolepis; red pine: Pinus densiflora; rigitaeda pine: P. rigitaeda) planted in the same year (1963), and growing under similar environmental conditions in the Sambong Exhibition Forests, Hamyang-gun, Gyeongsangnam-do. Litter was collected monthly between July 2006 and June 2008. Needle, broad leaf and total litter inputs followed a similar monthly pattern in the three coniferous plantations. The amounts of needles, flowers, and miscellaneous litter were significantly lower in the larch than in the two pine plantations, while branch litter was significantly higher in the larch than in the two pine plantations. Average total litterfall for two years was significantly higher for the pine (5,475 kg $ha^{-1}\;yr^{-1}$ for red pine and 5,290 kg $ha^{-1}\;yr^{-1}$ for rigitaeda pine) plantations than for the larch (3,953 kg $ha^{-1}\;yr^{-1}$ plantation. Needle litter comprised about 73.1% of total litterfall for the rigitaeda pine, 70.8% for the red pine and 62.9% for the larch plantations. Our results demonstrate that litterfall inputs can be affected by tree species.
( Jae Yoon Jeong ),( Joo Hyun Sohn ),( Won Sohn ),( Chan Hyuk Park ),( Tae Yeob Kim ),( Dae Won Jun ),( Yongsoo Kim ),( Woo Kyoung Jeong ) 대한간학회 2017 Gut and Liver Vol.11 No.6
Background/Aims: To investigate the use of measurements of liver stiffness (LS) by two-dimensional real-time shear wave elastography (SWE) for predicting the development of hepatocellular carcinoma (HCC) in patients with chronic hepatitis B (CHB). Methods: We retrospectively collected data on 291 enrolled patients with CHB whose LS had been measured using SWE. Results: The mean age of the patients was 46.8 years; males predominated (67%), and 40 of the patients (14%) had clinical cirrhosis. Among the patients, 165 (56.7%) received antiviral treatment. The median LS value was 7.4 kPa, and the median follow-up period was 35.8 months (range, 3.0 to 52.8 months). During follow-up, HCC developed in 13 patients (4.5%), and the cumulative incidence rates of HCC at 1, 2, and 4 years were 1.1%, 3.6%, and 8.4%, respectively. Based on a multivariate analysis, older age (≥50 years) and higher LS value (≥10 kPa) were independently associated with the risk of developing HCC (hazard ratio [HR], 4.53, p=0.023; and HR, 4.08, p=0.022). The cumulative incidence rate of HCC was significantly higher in patients with higher LS values (≥10 kPa) than in those with lower LS values (<10 kPa) (p=0.001). Conclusions: Increased LS measured by SWE at any time point regardless of antiviral treatment is associated with an increased risk of HCC in patients with CHB. (Gut Liver 2017;11:852-859)
문화예술전공 대학생의 직무만족, 고용장벽, 위험감수성향이 창업의도에 미치는 영향
정재엽(Jae-Yeob Jeong) 한국엔터테인먼트산업학회 2020 한국엔터테인먼트산업학회논문지 Vol.14 No.8
다수의 창업의도 논문은 창업유인요인에 대해 연구하고 있으나 실제 창업동기는 생계유지 등 창업압박요인이 높은 비중을 차지하고 있다. 이런 현실을 고려할 때 창업연구에서 고용장벽, 직무만족수준 등 창업압박요인을 연구하여야 한다. 본 논문은 문화예술인의 다수가 프리랜서 혹은 자기고용상태인 창업가라는 사실에 주목하였다. 문화예술 전공자를 대상으로 개인의 내외부 환경이 창업의도에 어떤 영향을 미치는지 계획적 행동이론을 기반으로 연구하였다. 개인이 취업과 창업사이에서 창업의도를 선택하게 된 요인을 탐색하고 이들 요인과 창업의도와의 관계에 대해 연구하였다. 연구결과 직무불만족과 고용장벽은 대표적인 창업압박요인이었다. 직무만족은 창업결과기대와 창업의도에 부정적인 영향을 주었으며 인지된 고용장벽은 창업결과기대와 창업의도에 긍정적인 영향을 주었다. 개인의 위험감수성은 대표적인 기업가정신 중 하나로 창업자기효능감에 긍정적인 영향을 주었다. 창업결과기대와 창업자기효능감은 창업의도에 긍정적인 영향을 주었다. Many former studies for the entrepreneurial intention dealt with the opportunity-driven motivation, but the actual entrepreneurial motivation is the necessity-driven motivation such as maintaining a living. It is necessary to study the necessity-driven factors for entrepreneurship such as employment barriers and job dissatisfaction. This study focused on the fact that the majority of cultural artists are freelancers or self-employed entrepreneurs. For those who majored in culture and arts, this study was conducted to investigate how an individual"s internal and external environment affects the entrepreneurial intention considering the theory of planned behavior. I explored the factors that led individuals to choose entrepreneurial intention between employment and entrepreneurship, and studied the relationship between these factors and the entrepreneurial intention. As the result of the study, the job dissatisfaction and the employment barriers were the pressure factors for entrepreneurship. Job satisfaction had a negative effect on the entrepreneurial outcome expectation and the entrepreneurial intention. The perceived employment barrier had a positive effect on the entrepreneurial outcome expectation and the entrepreneurial intention. An individual"s risk-taking orientation is one of the entrepreneurship and had the positive effect on the entrepreneurial self-efficacy. The entrepreneurial outcome expectation and the entrepreneurial self-efficacy had a positive effect on the entrepreneurial intention.