• 제목/요약/키워드: Evidence Analysis

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Alcohol Consumption and Breast Cancer Survival: A Metaanalysis of Cohort Studies

  • Gou, Yun-Jiu;Xie, Ding-Xiong;Yang, Ke-Hu;Liu, Ya-Li;Zhang, Jian-Hua;Li, Bin;He, Xiao-Dong
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권8호
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    • pp.4785-4790
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    • 2013
  • Background and Objectives: Evidence for associations between alcohol consumption with breast cancer survival are conflicting, so we conducted the present meta-analysis. Methods: Comprehensive searches were conducted to find cohort studies that evaluated the relationship between alcohol consumption with breast cancer survival. Data were analyzed with meta-analysis software. Results: We included 25 cohort studies. The meta-analysis results showed that alcohol consumption was not associated with increased breast cancer mortality and recurrence after pooling all data from highest versus lowest comparisons. Subgroup analyses showed that pre-diagnostic or post-diagnostic consumpotion, and ER status did not affect the relationship with breast cancer mortality and recurrence. Although the relationships of different alcohol consumption with breast cancer mortality and recurrence were not significant, there seemed to be a dose-response relationship of alcohol consumption with breast cancer mortality and recurrence. Only alcohol consumption of >20 g/d was associated with increased breast cancer mortality, but not with increased breast cancer recurrence. Conclusion: Although our meta-analysis showed alcohol drinking was not associated with increased breast cancer mortality and recurrence, there seemed to be a dose-response relationship of alcohol consumption with breast cancer mortality and recurrence and alcohol consumption of >20 g/d was associated with increased breast cancer mortality.

Effectiveness of Electroacupuncture for Patients with Failed Back Surgery Syndrome: A Systematic Review and Meta-analysis

  • Shin, Donghoon;Shin, Kyungmoon;Jeong, Hwejoon;Kang, Deok;Yang, Jaewoo;Oh, Jihoon;Lim, Jinwoong
    • Journal of Acupuncture Research
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    • 제39권3호
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    • pp.159-169
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    • 2022
  • Failed back surgery syndrome (FBSS) is a term that applies to symptoms such as persistent or recurring low back pain, paresthesia, sciatica, or numbness after spine surgery. Electroacupuncture (EA) has been reported to have excellent analgesic effects although there have been no systematic reviews on the effects of EA on FBSS. Therefore, a systematic review and meta-analysis of the effectiveness of EA on FBSS was conducted. Eight databases were searched for studies that used EA for FBSS and 7 randomized controlled trials (RCTs) were included. RCTs of EA as combination therapy for FBSS compared with conventional treatment demonstrated improvement in the level of pain, lumbar functional scale scores, and quality of life. However, meta-analysis showed that reduction in pain was not statistically significant, while evaluation of lumbar function significantly improved, although the quality of evidence in the RCTs was generally low. RCTs comparing EA alone with conventional treatment demonstrated an improved level of pain, lumbar function, and effective rate of treatment. Meta-analysis showed that pain was significantly decreased in the EA alone group compared with the control group, although the quality of evidence was low. To improve the quality of evidence, high-quality RCTs are required in the future.

초등예비교사의 과학 동기유발과 과학적 소양의 역량에 대한 인과구조 (The Causal Structure to the Scientific Motivation and the Scientific Literacy Competency in Pre-service Elementary Teachers)

  • 김동욱
    • 한국초등과학교육학회지:초등과학교육
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    • 제36권3호
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    • pp.208-218
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    • 2017
  • This study was to investigate factors and disclose causal model of the scientific literacy competency about the motivation for science and the scientific literacy competency. The 3 grade university students and the 1 grade university students as pre-service elementary teachers were participated to questionnaire investigation. The data were analyzed by the factor analysis method and the structural equation model method, and the following results were obtained. First, the 3 grade university students and the 1 grade university students perceived the science interest factors and science usefulness factors as the motivation for science, and also revealed the scientific problem recognition factor and the scientific evidence use factor as the scientific literacy competency. Second, the science interest factor had a greater effect on the scientific problem recognition factor than the scientific evidence use factor in both the 3 grade and 1 grade university students. In the path from the science usefulness factor to the scientific problem recognition factor, the science usefulness factor of the 3 grade university students had a greater influence on the direct route to the scientific problem recognition factor than that of the 1 grade university students. In the path from the science usefulness factor to the scientific evidence use factor, the science usefulness factor of the 1 grade university students influenced more on the direct route to the scientific evidence use factor than that of the 3 grade university students.

Effects of Visible and Invisible Factors and Buying Impulse Intention upon Store Loyalty: Focused on Physical Evidence and Word-of-Mouth of Discount Store

  • Yang, Hoe-Chang;Ahn, Ho-Keun;Lee, Young-Chul
    • 유통과학연구
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    • 제11권11호
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    • pp.57-61
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    • 2013
  • Purpose - This study aimed to understand the influence of visible factors directly shown to and experienced by consumers such as physical evidence, and invisible factors obtained through acquaintances or other experienced consumers such as word-of-mouth, in the discount stores' marketing communication on impulse buying intention and store loyalty. Research Design, Data, and Methodology - This study examined the effect of factors in discount stores' marketing communication, for instance, physical evidence, word-of-mouth, and buying impulse intention. The questionnaire survey resulted in 68 completed questionnaires. Results - Physical evidence and word-of-mouth have a statistically significant positive effect on store loyalty. The results of regression analysis regarding whether visible or invisible factors have more impact showed that word-of-mouth has a statistically significant positive effect on store loyalty. With regard to impulse buying intention, only word-of-mouth was statistically significant. Conclusion These results suggested that visible and invisible factors that appeal to customers are very important. In particular, the results suggested that stores should create invisible factors (e.g., positive word-of-mouth) for their customers.

우리나라 보건의료 발전을 위한 의료기술평가의 역할 (Roles of Health Technology Assessment for Better Health and Universal Health Coverage in Korea)

  • 이영성
    • 보건행정학회지
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    • 제28권3호
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    • pp.263-271
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    • 2018
  • Health technology assessment (HTA) is defined as multidisciplinary policy analysis to look into the medical, economic, social, and ethical implications of the development, distribution, and use of health technology. Following the recent changes in the social environment, there are increasing needs to improve Korea's healthcare environment by, inter alia, assessing health technologies in an organized, timely manner in accordance with the government's strategies to ensure that citizens' medical expenses are kept at a stable level. Dedicated to HTA and research, the National Evidence-based Healthcare Collaborating Agency (NECA) analyzes and provides grounds on the clinical safety, efficacy, and economic feasibility of health technologies. HTA offers the most suitable grounds for decision making not only by healthcare professionals but also by policy makers and citizens as seen in a case in 2009 where research revealed that glucosamine lacked preventive and treatment effects for osteoarthritis and glucosamine was subsequently excluded from the National Health Insurance's benefit list to stop the insurance scheme from suffering financial losses and citizens from paying unnecessary medical expenses. For the development of HTA in Korea, the NECA will continue exerting itself to accomplish its mission of providing policy support by health technology reassessment, promoting the establishment and use of big data and HTA platforms for public interest, and developing a new value-based HTA system.

Regional Multinationals: Evidence from Wal-Mart's Withdrawal from the South Korean Market

  • AHN, Se-Yeon
    • 동아시아경상학회지
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    • 제9권1호
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    • pp.53-61
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    • 2021
  • Purpose - This study aims to understand the phenomenon called "regional multinational" in the geographical expansion of multinational enterprises and to find some evidence whether globalization of multinational enterprises tends to have a strong home region bias. Research design, data, and methodology - Through an in-depth case analysis, we analyze the series of strategic behaviors Wal-Mart made in South Korea from its entry in 1998 to its withdrawal in 2006. Then, we discuss the plausible causes of this exit, seeking to provide some evidence on the "regional multinational" phenomenon. Result - This study finds some evidence on the regional-based expansion of multinational enterprises. Our case study shows that Wal-Mart in South Korea focused on global standardization strategy and made an exit from the market as they were faced with increasing localization demands. From the perspective of multinational enterprises' globalization strategy, Wal-Mart's exit from the South Korean market can be considered as a strategic exit. Conclusion - The findings of this study suggest that while national responsiveness and localized adaptation are considered as a panacea for penetrating international markets, in reality most multinational enterprises attempt to add value primarily by capitalizing on similarities across markets and remain as regional multinationals.

Weight of Evidence를 활용한 성폭력 범죄 위험의 확률적 예측 (Probabilistic Prediction of the Risk of Sexual Crimes Using Weight of Evidence)

  • 김보은;김영훈
    • 한국지리정보학회지
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    • 제22권4호
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    • pp.72-85
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    • 2019
  • 본 연구는 일상생활 가운데 누구나 겪을 수 있는 성폭력 범죄 위험의 예측을 목적으로 한다. 2011-2015년 5년 간 청주시 일부 지역에서 발생한 성폭력 범죄를 대상으로 베이지안 통계 기반의 Weight of Evidence를 적용·분석하였다. Weight of Evidence를 활용하여 분석한 결과 첫째, 투입된 관련요인(Evidence) 총 26개 중 주거용도면적, 건축물 사용승인일, 개별주택가격, 용적률, 지하층 수, 대지면적, 보안등, 오락시설 8개만이 신뢰도를 만족하여 각각의 가중치(Weight)가 산출되었다. 둘째, 가중치가 산출된 8개의 관련요인을 결합하여 최종적으로 예측 지도를 도출하였다. 성폭력 범죄가 발생할 위험이 75.5%인 지역은 대상지역 전체면적의 20.7%(2.0㎢)를 차지하였으며 16.5% 지역은 3.3%(0.3㎢), 34.5% 지역은 19.0%(1.8㎢)로 나타났다. 본 연구는 성폭력 범죄 위험의 발생 확률과 이를 감소시킬 수 있는 환경적 요인 또는 조건을 도출하였다. 이와 같은 결과는 경찰의 범죄예방 활동 등 성폭력 범죄 피해 최소화를 위한 선제적 대응방안 마련의 기초자료로서 활용될 수 있을 것이다.

예비 초등교사의 과학 탐구 글쓰기 활동에서 나타난 이론과 증거의 조정 과정 분석 (Analyzing Coordination of Theory and Evidence Presented in Pre-service Elementary Teachers' Science Writing for Inquiry Activities)

  • 이선경;이규호;최취임;신명경
    • 한국과학교육학회지
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    • 제32권2호
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    • pp.201-209
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    • 2012
  • 본 연구는 예비초등교사들이 과학탐구를 수행하고 이에 대한 과학글쓰기를 분석하여 증거와 이론의 조정의 유형과 특성을 탐색하기 위한 연구이다. 본 연구에서 4개의 과학탐구활동에서 총 115개의 예비초등교사들의 글쓰기가 수집 및 분석되었다. 글쓰기 분석을 바탕으로 4개의 이론과 증거의 조정 유형을 발견할 수 있었다. 본 연구는 다음과 같이 유형을 제안한다. 유형1은 증거와 이론의 일치, 유형2는 증거와 이론의 일치 및 이론의 확장과 정교화, 유형3은 증거와 이론의 불일치, 마지막으로 유형4는 증거와 이론의 불일치 및 조정으로 보았다. 본 연구결과 우선 빈도수를 고려할 때 가장 많은 것에서 적은 것의 순으로 보면 유형1, 유형3, 유형2, 유형4의 순이다. 가장 빈도수가 높은 것으로 유형1이 나왔는데 이는 탐구질문에 내재된 이론이 참여자에 의해 쉽게 파악되었고 이를 지지하는 증거를 발견된 자료 중에서 골라냈다는 것으로 해석된다. 탐구주제와 조정유형의 빈도수 사이에 관련성이 별로 없었으나 예외적으로 활동1은 관련성을 보여주었다. 본연구의 이러한 결과는 학생들이 자신이 이미 가지고 있는 지식을 실험계획, 자료분석 및 해석 그리고 과학주장을 만들어내는 과정에서 잘 융합하고 있다는 점과 연관성이 있다고 보여진다.

Weight of Evidence 기법을 이용한 영남지역의 산지습지 가능지역 추출 (Potential Mapping of Mountainous Wetlands using Weights of Evidence Model in Yeongnam Area, Korea)

  • 백승균;장동호
    • 한국지형학회지
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    • 제20권1호
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    • pp.21-33
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    • 2013
  • 이 연구에서는 접근이 어렵고 범위가 광대하여 많은 시간과 비용이 소요되는 산지습지의 현장조사 대상범위를 줄이고 작업의 효율성을 높이기 위해 산지 습지 위치와 지형 및 기타 GIS 정보 사이의 관계를 확률로 표현하는 Weight of Evidence 기법을 적용하여 산지습지 가능지역을 추출하였다. 이를 위하여 영남지역을 대상으로 산지습지와 관련된 경사 분포, 곡률 분포, 식생지수 분포, 습윤지수 분포, 토양 배수등급 분포 등 공간 데이터베이스를 구축하고 이를 기존 산지습지 위치와의 상관관계를 통하여 Weight of Evidence를 구하였다. 우도비를 통하여 산지습지 가능성에 대한 각 요인의 등급을 분석한 결과 경사도, 곡률, 식생지수, 습윤지수가 낮을수록, 토양 배수등급이 양호한 곳에 산지습지 분포 가능성이 높은 것으로 나타났다. 산지습지가능성도 작성을 위하여 각 요인의 등급에 대하여 Weight of Evidence 가중치를 부여하고 GIS 중첩분석을 실시하여 산지습지가능지수를 산출하였다. 그리고 검증을 위하여 산지습지 가능지수 등급구간에 대한 산지습지 위치 포함 누적비율을 표시한 성공확률곡선을 작성하고 면적비율을 계산한 결과 75.48%로서 상당히 높은 예측정확도를 나타내었다.

Against the Asymmetric CP- V2 Analysis of Old English

  • Yoon, Hee-Cheol
    • 한국영어학회지:영어학
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    • 제4권2호
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    • pp.117-149
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    • 2004
  • The paper is to argue against the asymmetric CP-V2 analysis of Old English, according to which finite verbs invariably undergo movement into a clause-final T within subordinate clauses and reach the functional head C within main clauses. The asymmetric CP-V2 analysis, first of all, faces difficulty in explaining a wide range of post-verbal elements within subordinate clauses. To resolve the problem, the analysis has to abandon the obligatoriness of V-to-T movement or introduce various types of extraposition whose status is dubious as a legitimate syntactic operation. Obligatory V-to-T movement in Old English lacks conceptual justification as well. Crosslinguistic evidence reveals that morphological richness in verbal inflection cannot entail overt verb movement. Moreover, the operation is always string-vacuous under the asymmetric CP- V2 analysis and has no effect at the interfaces, in violation of the principle of economy. The distribution of Old English finite verbs in main clauses also undermines the asymmetric CP-V2 analysis. Conceptually speaking, a proper syntactic trigger cannot be confirmed to motivate obligatory verb movement to C. The operation not only gets little support from nominative Case marking, the distribution of expletives, or complementizer agreement but also requires the unconvincing stipulation that expletives as well as sentence-initial subjects result from string-vacuous topicalization. Finally, textual evidence testifies that Old English sometimes permits non-V2 ordering patterns, many of which remain unexplained under the asymmetric CP-V2 analysis.

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