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      • KCI등재

        연구논문 : 알레르기 질환 유병률 조사의 표본설계와 설계효과 분석

        이기재 ( Kee Jae Lee ),권호장 ( Ho Jang Kwon ),안강모 ( Kang Mo Ahn ),채유미 ( Yoomi Chae ),함명일 ( Myung Il Hahm ),김지현 ( Ji Hyun Kim ),박용민 ( Yong Mean Park ),이소연 ( So Yeon Lee ),한만용 ( Man Yong Han ),김우경 ( Woo Kyun 한국조사연구학회 2012 조사연구 Vol.13 No.2

        2010년「알레르기 질환 유병률 조사」는 국제적으로 비교 가능한 알레르기 질환 유병률지표 산출을 목적으로 ISAAC 프로그램에 기반한 조사수행 체계에 따라 진행되었다. 본 연구는 새로운「알레르기 질환 유병률 조사」를 위한 표본설계와 2010년 조사결과를 분석하여 얻은 설계효과와 급내상관계수를 제시한 것이다. 새로운 표본설계는 외국자료와의 비교, 유병률 추정의 정확도 향상, 그리고 서울과 지방의 추정결과 비교 등이 가능하도록 설계하였다. 이 조사는 학교를 1차추출단위로 하고 학급을 2차추출단위로 하는 층화2단계확률비례추출법에 따라 추출되었다. 1차추출단위인 학교에 대한 층화기준은 지역(7개 권역)과 학교 소재지의 특성(대도시, 고밀집, 중밀집, 저밀집)에 따른 구분을 이용하였다. 2010년 조사를 완료한 후 추출확률, 무응답 보정, 사후층화 조정 등을 반영한 가중치를 산출하여 추정에 활용하였다. 또한 2010년 조사데이터에 대한 설계효과와 급내상관계수를 분석하고, 향후 연구방향을 제시하였다. To investigate the prevalence of asthma, atopic dermatitis, and allergic rhinitis, we did a cross-sectional survey using the ISAAC(International Study of Asthma and Allergies in Childhood) protocol to enhance the comparability of the prevalence estimates. The purpose of this article is to present the sample design, design effect and intra-cluster correlation analysis for the epidemiologic study of allergic diseases in Korean children. The sampling frame was based on a comprehensive national list of schools in Korea. The participants of this survey were selected using a stratified two-stage cluster sampling design. For the first stage of sampling, schools were stratified by geographic regions (7 regions) and the type of school location (metropolitan city, urban areas, rural areas). Because the participants for this survey were selected using a stratified two-stage cluster sampling design, we calculated the sampling weights for this study to take into account differential selection probabilities, non-response and post-stratification. The results and practical issues of the design effect analysis were presented.

      • SCOPUSKCI등재

        혈관경의 구조 및 피판의 크기에 따른 도서형피판의 생존비율에 관한 비교연구

        김우경,정원균,한승규 大韓成形外科學會 1995 Archives of Plastic Surgery Vol.22 No.5

        A lot of reconstructive methods for soft tissue defects involving skin have been introduced, but there were some limitations in each method. Recently, there have been some reports of successful skin flaps that apparently depend on only arterial or venous blood flow. We performed this study to compare the survival rates of arterial and venous island flaps with those of conventional ones, the survival rates of arterial and venous island flaps each other, and the survival rates according to the flap size. On the groin area of the rats, skin flaps were elevated bilaterally based on inferior epigastric artery or vein. They were divided into three groups: group Ⅰ-flaps based on inferior epigastric artery : group Ⅱ-flaps based on inferior epigastric vein : group Ⅲ - flaps with inferior epigastric artery and vein. Each group included twenty four flaps and were subdivided into subgroup A(n=12) and subgroup B(n=12) according to flap size(subgroup A : 2×3cm, subgroup B : 1×1.5cm). Flap survival rates of each group were evaluated and compared. The results were as followings: 1. Survival rates of the arterial and venous island flaps were significantly lower than those of conventional island flaps regardless of flap size (P < 0.050). 2. In making a comparison between arterial and venous island flaps, survival rate of the venous island flaps was higher than that of arterial ones. Especially in large flaps the difference was statistically significant (P=0.019). 3. Survival rate of large flaps was lower than that of small ones, but statically not significant. All conventional flaps survived completely regardlessly of flap size.

      • SCOPUSKCI등재

        수지부 역혈행성 도서형 피판-97례 임상분석

        정원균,이병일,한승규,김우경,윤을식 大韓成形外科學會 1995 Archives of Plastic Surgery Vol.22 No.6

        Finger tip injuries represent the most common type of injuries seen in the upper extremity. Their managements are important functionally and aesthetically, but at the same time perhapse the most controversial. From July 1984 to January 1995, 97 fingers in 90 patients with defect of distal phalanx were reconstructed by reverse digital island flaps at the Korea University Guro Hospital. We reviewed the medical records of our cases and analyzed them in several aspects. In 16 cases neurorrhaphy was performed. Majority of the cases were covered primarily and 21 cases it was used for defect after composit graft or replantation. The survival of these flaps was successful in all cases except one case. 38 fingers in 36 patients were involved in long term follow up more then 6 months. Light touch and temperature sensation could be detected in all the evaluated flaps. The mean values of the static two-point discrimination in sensate and nonsensate flaps were 6.4 and 10.4mm retrospectively. Our patients were usually satisfied with the end result of these flaps aesthetically and functionally. We consider that reverse digital island flap is a safe and reliable procedure with high survival rate and an excellent choice for coverage of defect of distal phalanx.

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