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우리나라 여성의 유방암 검진: 2008년 국가암검진 사업 결과
오동관,심정임,한미아,김연주,이후연,전재관,최귀선,박은철 한국유방암학회 2010 Journal of breast cancer Vol.13 No.3
Purpose: The Korean National Cancer Screening Program began in 1999. To provide essential evidence related to breast cancer screening in Korean women, we analyzed data from the KNCSP in 2008. Methods: Using data obtained from the National Cancer Screening Information System, breast cancer screening participation rates were calculated. Recall rates were estimated with 95% confidence intervals (CI). Results: The target population of breast cancer screening in 2008 included 3,706,062 women, 1,294,060 of whom utilized mammography as a screening tool (participation rate, 34.9%). Compared to the participation rate of women covered by the National Health Insurance Program (37.3%), women covered by the Medical Aid Program was lower (21.3%). The overall recall rate of breast cancer screening was 6.4% (95% CI, 6.39-6.47). Conclusion: According to our study, efforts to facilitate the participation and to reduce disparities in breast cancer screening among Korean women are needed. These results will provide essential data for evidence-based strategies in breast cancer control in Korea.
김병수,오동관,정우석 한국자료분석학회 2009 Journal of the Korean Data Analysis Society Vol.11 No.2
In the data analysis, it is fundamental to test equality of two population means with samples from independent normal distribution. In many cases we do not know the population variance, thus we do not know whether two population variances are equal. In that cases, sometimes preliminary variances equality test is used. If the null hypothesis is not rejected, then Studenet's t-test is performed, otherwise Satterthwaite's t-test is performed. In this articles, we make a comparison three tests; always performing Student's t-test(AT), always performing Satterthwaite's t-test(AS), performing Student's t-test or Satterthwaite's t-test(SS) according to the result of preliminary variance equality test. From the comparison of the sizes and powers of tests with exact calculation and simulation, we get that AT and SS may have serious bias in size. Also we get that the bias of AS is not serious and SS has similar power as AT and SS when two tests are not biased in size. Thus AS is recommended to test of means equality when the population variance is unknown. 정규분포를 따르는 두 모집단으로부터 추출된 독립표본에서 모평균이 다른지에 대한 검정은 통계자료를 다루는 데 기본적인 검정이다. 우리가 접하는 대부분의 자료들은 분산이 같은지 알 수 없는 경우가 많으며, 많은 교재와 연구에서는 분산동일성 검정을 수행하고 그 결과에 따라 스튜던트 t-검정 또는 Satterthwaite t-검정의 평균동일성 검정을 시행하는 2단계 검정법을 채택하고 있다. 본 연구에서는 분산동일성 검정에 관계 없이 항상 스튜던트 t-검정을 시행하는 검정(AT), 분산동일성 검정에 관계 없이 항상 Satterthwaite t-검정을 시행하는 검정(AS), 그리고 분산동일성 검정 결과에 따라 스튜던트 t-검정 또는 Satterthwaite t-검정을 시행하는 검정(SS)에 대해서 다루었다. AT와 SS는 모분산이 같은 경우에는 검정의 크기에서 좋은 성질을 보이지만, 분산이 다른 경우에는 심각한 편의를 보인다. AS는 검정크기에 편의가 있는 경우도 있지만 크지 않으며 검정력도 AT와 SS에 비해 크게 떨어지지 않는다. 따라서, 두 모집단의 평균비교에서 두 모분산이 같은 지 모를 때에는 AT나 SS보다는 AS 검정법을 사용하는 것이 바람직하다.
A Study on Survey Questionnaire to Measure the Knowledge Level of the Foodborne Disease
배화수,오동관,김정인,최국렬,김병수,조영준 한국데이터정보과학회 2008 한국데이터정보과학회지 Vol.19 No.1
In this article, the aim is at evaluating the knowledge level of the foodborne disease by developing a reasonable survey questionnaire model. Each questions of the questionnaire is made up to check the knowledge covering the several fields of materials related to the foodborne disease. The pilot survey is implemented to evaluate the validity of questionnaire. Each question in questionnaire is scored to get the quantitative measure of the foodborne disease knowledge by converting the total score into 100 points.
Gastric Cancer Screening in Korea: Report on the National Cancer Screening Program in 2008
이경숙,오동관,한미아,이후연,전재관,최귀선,박은철 대한암학회 2011 Cancer Research and Treatment Vol.43 No.2
Purpose The National Cancer Screening Program (NCSP) began in 1999. The objective of this report is to evaluate the results of the NCSP in 2008 and provide essential evidence associated with the gastric cancer screening program in Korea. Materials and Methods Data was obtained from the National Cancer Screening Information System; participation rates in gastric cancer screening were calculated. According to screening modalities, recall rates were estimated with 95% confidence intervals (CIs). Results The target population of the gastric cancer screening program in 2008 was 7,132,820 Korean men and women aged 40 and over, 2,076,544 of whom underwent upper endoscopy or upper gastrointestinal (UGI) series as screening tools (participation rate, 29.1%). Disparities in participation rates were observed relating to gender and health insurance type. Overall,recall rates of upper endoscopy and UGI series were 3.1% (95% CI, 3.0 to 3.1) and 33.3% (95%CI, 33.3 to 33.4), respectively. Conclusion According to our research, efforts to facilitate participation and to reduce disparities in gastric cancer screening among Korean men and women are needed. These results will provide essential data for evidence-based strategies in gastric cancer control in Korea.