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지방상수도 서비스의 생산비용 및 요금에 관한 영향요인 연구
정성영 ( Seong Young Jeong ),조세현 ( Sae Hyen Cho ),현대용 ( Dae Yong Hyun ),배수호 ( Su Ho Bae ) 한국지방행정연구원 2012 地方行政硏究 Vol.26 No.3
본 연구는 지방상수도 서비스의 생산비용 및 요금에 영향을 주는 요인을 실증적으로 분석하는데 목적이 있다. 종속변수는 상수도 생산비용 및 요금이며, 독립변수는 공급적 요인, 수요적 요인, 재정 제도적 요인 등으로 나누어 살펴본다. 실증분석을 위해 156개 지방 상수도사업자를 대상으로 2000년도부터 2009년도까지 10년치 패널 자료를 활용한다. 상수도 생산비용 및 상수도 요금을 경험적으로 추정하는데 두 회귀방정식 간의 잔차항들이 서로 높은 상관관계를 보이기 때문에 분석방법으로 SUR(seemingly unrelated regression) 모형을 활용한다. 분석결과에 따르면, 공급적 요인, 수요적 요인, 재정 제도적 요인들이 두루 상수도 생산비용 및 요금에 유의미한 영향을 미치는 것으로 나타났다. 우선 상수도 생산비용에 부정적 영향을 미치는 변수들은 상수도 시설용량과 인구밀도이었고, 긍정적 영향을 미치는 변수들은 단독주택 비율, 연립주택 비율, 상수도 보급률, 누수율, 상수도 부채 액이었다. 한편상수도 요금에 부정적 영향을 미치는 변수들은 상수도 시설용량, 인구밀도, 재정자립도이었고, 긍정적 영향을 미치는 변수들은 상수도관 길이, 지방자치단체가 일반시인 경우, 상수도 부채 액이었다. The purpose of this paper is to examine factors affecting local water supply costs and water prices in Korea. Our major concerns are in the following: (1) supply-side factors, (2) demand-side factors, and (3) institutional and financial factors. We utilize a seemingly unrelated regression (SUR) estimation method to take into account the correlations between the residuals in the both equations for our dependent variables, i.e., water supply costs and water prices. In doing that, it utilizes panel data (2000 to 2009) from 156 local water suppliers in Korea. According to empirical findings, institutional and financial factors, along with supply-side and demand-side factors, significantly affect local water supply costs and water prices. In details, water supply capacity and population density have negative effects on water supply costs, while water supply rates, water leakage rates, single household rates, multiple household rates, and water supply-related debts have positive effects. Water supply capacity, population density, and local financial autonomy make contributions to a decrease in water prices, while pipe length, a local government categorized as a city rather than a county, and water supply-related debts contribute to an increase in water prices. These findings suggest that we need to consider not only supply-side and demand-side factors but also institutional and financial factors in order to reduce water supply costs and prices.
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긴 관상동맥 병변에 대한 제1세대 및 2세대 약물용출 스텐트 중첩 시술 후 2년간 임상 경과의 비교
오경수 ( Kyung Soo Oh ),정명호 ( Myung Ho Jeong ),이정애 ( Jung Ae Rhee ),최진수 ( Jin Su Choi ),이두환 ( Doo Hwan Lee ),김정훈 ( Jeong Hun Kim ),박수환 ( Soo Hwan Park ),김인수 ( In Soo Kim ),현대용 ( Dae Yong Hyun ),정윤아 ( Yun 대한내과학회 2015 대한내과학회지 Vol.89 No.2
Background/Aims: Despite improved revascularization techniques, the clinical outcomes of patients with diffuse coronary artery lesions after percutaneous coronary intervention are unsatisfactory. However, few studies have compared the efficacy of first- and second-generation drug-eluting stents (DES) in patients with diffuse long coronary artery lesions. Methods: Between January 2006 and July 2012, 364 patients who were treated with DES for long coronary artery stenosis (> 30 mm) were enrolled in this study and assigned to either Group I (first-generation DES, 62.3 ± 10.4 years, 136 males, n = 183) or Group II (second-generation DES, 64.3 ± 10.7 years, 134 males, n = 181). The incidence of major adverse cardiac events (MACE) was compared between the two groups over 2 years of follow-up, and predictive factors associated with MACE were evaluated through a multivariate analysis. Results: Although several coronary angiographic characteristics were different between the two groups, most demographic and baseline clinical variables were the same. The cumulative incidence of MACE was significantly higher in Group I than in Group II (25.7 vs. 6.6%, p < 0.001), mainly due to reduced target lesion revascularization (21.9 vs. 2.2%, p < 0.001). According to the results of the multivariate analysis, the use of a paclitaxel-eluting stent (PES) (hazard ratio [HR], 5.168, 95% confidence interval [CI], 2.515-10.617, p < 0.001), decreased left ventricular function (≤ 45%, HR, 3.586, 95% CI, 1.839-6.990, p < 0.001), and diabetes mellitus (HR, 2.984, 95% CI, 1.605-5.548, p < 0.001) were independent contributors to MACE.
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원 저급성 심근경색증 환자에서 Everolimus-eluting Stent와 Biolimus-eluting Stent 시술 후 임상 경과
박인철 ( In Cheol Park ),정명호 ( Myung Ho Jeong ),김인수 ( In Soo Kim ),이정애 ( Jung Ae Rhee ),최진수 ( Jin Su Choi ),박인혜 ( In Hyae Park ),채임순 ( Leem Soon Chai ),정윤아 ( Yun Ah Jeong ),현대용 ( Dae Yong Hyun ),정해창 ( Ha 대한내과학회 2015 대한내과학회지 Vol.89 No.4
Background/Aims: We compared the efficacy and safety of the second-generation everolimus-eluting stent (EES) and the third generation biolimus-eluting stent (BES) in patients with acute myocardial infarction (AMI). Methods: We analyzed 629 consecutive patients (mean age 65.1 ± 11.2 years, 426 males) with AMI undergoing percutaneous coronary intervention from February 2008 to April 2012. They were divided into two groups according to stent type (EES group, n = 426; BES group, n = 203). The primary end-point was 2-year major adverse cardiac events (MACEs), defined as the composite of all-cause death, myocardial infarction, target vessel revascularization, non-target vessel revascularization and target lesion revascularization. The secondary end-point was 2-year target lesion failure (TLF). Results: There were no significant differences in baseline characteristics, except that the patients with EES had a significantly higher prevalence of diabetes mellitus (34.7 vs. 22.7%, p = 0.002) and were older (67.1 ± 11.3 vs. 64 ± 12.9 years, p = 0.039) com-pared with the patients with BES. After propensity score matching, 2-year clinical outcomes showed no differences in composite MACEs or TLF between the two groups. Multivariate Cox regression analysis showed that stent type was not a predictor of 2-year mortality or MACEs. However, older age (hazard ratio [HR] 1.037, 95% confidence interval [CI] 1.014-1.060, p = 0.001), diabetes mellitus (HR 2.247, 95% CI 1.426-3.539, p = 0.001) and a left ventricular ejection fraction ≤ 45% (HR 3.007, 95% CI 1.978-4.573, p = 0.001) were independent predictors for 2-year MACEs in patients undergoing EES or BES. Conclusions: Patients with BES had similar clinical 2-year outcomes compared with EES patients with AMI. (Korean J Med 2015;89:418-427)
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