• 대한예방의학회:학술대회논문집
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• 2003.04a
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• pp.38-40
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• 2003

o 만성질환을 중심으로 현재 구축, 운영중인 14개의 코호트에 대하여 정리해 보았을 때, 자발적 참여자 중심의 코호트 형태와 1만명 이상의 규모가 다수를 차지 하였다. 연구기간에 있어 최장 13년이 있지만, 최다 연구기간이 1년이라는 점에서 현재 국내 코호트 연구는 시작단계로 해석된다.

• 대한예방의학회:학술대회논문집
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• 2003.04a
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• pp.54-60
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• 2003

• Journal of Families and Better Life
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• v.12 no.2
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• pp.252-261
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• 1994

본 연구는 한국 여성의 결혼전이 시기에 미치는 개인, 가족, 사회구조의 다차원적 요인의 영향력을 추정하려는 것이다. 총 634명의 1940, 50년대 코호트 여성을 대상으로 분석한 결과, 1940년대 코호트의 경우, 다른 집단에 비해 취업률이 낮고 가족주의 가치관이 높을 때 결혼을 늦게 하고 장녀인 경우에는 제 때에 결혼하는 것으로 나타났다. 1950년대 코호트는 다른집단에 비해 성비와 취업률이 높고 교육수준이 낮을 때 결혼을 일찍하고 부의 직업이 하위적이고 결혼전 취업년수가 길 때 늦게 결혼하는 것으로 나타났다.

• Analyses & Alternatives
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• v.8 no.2
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• pp.31-64
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• 2024

The recent trend of declining consciousness regarding the necessity of unification among South Korean citizens is evident. Does a cohort effect exist in this downward trend in the perception of the necessity of unification? The purpose of this study is to analyze whether birth cohorts statistically significantly influence the consciousness of the necessity of unification. To this end, the hierarchical age-period-cohort (HAPC) model was employed as the analytical model, and data from the Unification Consciousness Survey conducted by Seoul National University's Institute for Peace and Unification Studies from 2007 to 2021 was used. The analysis results showed evidence that the progress of economic inequality at the birth cohort level affected the decline in the perception of the necessity of unification. The 1980s birth cohort, which faced socioeconomic difficulties during their social advancement due to income and wealth polarization, is observed to have a distinctly negative perception of unification requiring massive financial resources, compared to the 1960s and 1970s birth cohorts.

• Korea journal of population studies
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• v.35 no.1
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• pp.151-179
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• 2012

This study investigates birth cohort and educational differences in the marital and fertility life course using the Hernes model. First, lifetime marriage rates remain high across birth cohorts but men in the youngest birth cohort(1965-74) experience a somewhat significant reduction in ever-marriage rates. Second, this study also finds educational differences in lifetime marriage rates across birth cohorts. The likelihood of being never married is particularly high for poorly educated men in the youngest birth cohort but women show the opposite pattern. Third, quantum changes in the fertility transition are more likely to be the changes in higher-order births, while the changes in first and second births are mainly tempo changes. Fourth, the negative association between education and fertility is significantly larger for higher-order births. Finally, marriage and fertility show the opposite pattern in their association with education. Overall, educational differences in lifetime marriage rates become stronger across birth cohorts but the association between education and higher-order births shows the opposite pattern.

• Journal of the Korea Society for Simulation
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• v.25 no.1
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• pp.29-34
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• 2016

Many researchers have used cohort DB (database) to predict the occurrence of disease or to keep track of disease spread. Cohort DB is Big Data which has simply stored disease and health information as separated DB table sets. To measure the relations between health information, It is necessary to reconstruct cohort DB which follows research purpose. In this paper, XML descriptor, editor has been used to construct ontology-based Big Data cohort DB. Also, we have developed ontology based cohort DB search system to check results of relations between health information. XML editor has used 7 layered Ontology development 101 and OWL API to change cohort DB into ontology-based. Ontology-based cohort DB system can measure the relation of disease and health information and can be used effectively when semantic relations are found. We have developed ontology-based cohort DB search system which can measure the relations between disease and health information. And it is very effective when searched results are semantic relations.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06c
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• pp.98-101
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• 2011

코호트연구는 특정 집단을 계속 추적해 가면서 과거의 행동이 미래에 어떠한 영향을 미치는가에 대하여 알아보는 역학적 연구이다. 짧게는 2개월에서 길게는 수십 년에 걸쳐서 진행 된다. 일반적으로 식사조사 프로그램을 이용하여 연구대상자들에 대한 식사조사기록을 저장하게 되는데, 이러한 기록들은 수십 년에 해당하는 결과를 장기간 지속적으로 저장하고 보존하여야 한다. 하지만, 현존하는 식사조사 프로그램들은 대부분 운영체제 및 시스템에 종속적이기 때문에 운영체제가 변경되면 프로그램도 같이 변경되어야 하는 문제점을 가지고 있다. 이는, 장기간의 식사조사기록을 보관하여 연구를 하는 코호트연구에 있어서는 심각한 문제이다. 때문에, 장기보존을 위해서는 장기보존 시스템을 구축할 필요성이 존재하며, 각 식사조사 프로그램은 장기보존시스템과 연동 할 수 있는 식사조사 기록 생성 시스템이 필요하다. 따라서 본 논문에서는 OAIS(Open Archival Information System) 참조 모델의 SIP와 METS(Metadata Encoding and Transmission Standard)를 이용하여 식사조사기록을 장기 보존 관리 하는 시스템에 적용할 수 있는 식사 조사기록 생성 시스템을 제안 한다. 제안한 시스템은 XML 패키지를 이용하여 식사조사기록을 생성하는 인터페이스를 제공한다.

• Journal of the Korean association of regional geographers
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• v.17 no.1
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• pp.75-95
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• 2011

A birth cohort approach to the Household life-cycle model could be an alternative to cross-sectional data. In this study, each residential mobilities of birth cohorts' is traced by the cohort data from repeated cross-section in the case of Jinju city. Because of the differences in fertilities by era, the volume of each cohort as a consumer in housing has varied and the condition of housing stock also has changed as the time goes by. These changes in housing make not only age effect stressed in Rossi's model, but also cohort and period effect. Due to theses effects of time, every residential mobility trajectories of generations' is different especially in earlier life stages. As households get older, it is found that the age effect reduces and the probability of residential mobility is lower. As this result, the residential succession and filtering between the earlier and latter generations is weakened and the residential segregation could be happened by birth cohort.

• The Korean Journal of Applied Statistics
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• v.31 no.4
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• pp.427-446
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• 2018

Korea will have a super-aged society within only 30 years according to the United Nations' definition of an aging society and the statistics on Korea's Population projections (2016), indicates that Korea has the fastest ageing speed in the world. There is a lack of data on long-term time-series data on death as related to pension and welfare policies compared to the rapid rate of aging. This paper estimates life expectancy over 245 years (from 1955 to 2200) through past and future forecasts as well as compares the expected life expectancy of the synthetic cohort and the real cohort. In addition, an international comparisons were made to understand the level of aging in Korea. Estimates of the back-projection period were compared with previous studies and the LC model to improve accuracy and objectivity. In addition, the predictions after 2016 reflected the declined mortality rate effect of Korea using the LC-ER model. The results showed an increase in life expectancy of about 30 years over 60 years (1955-2015) with an expected life expectancy of the real cohort over the second century (1955-2155) higher than the synthetic cohort. The comparative advantage of life expectancy of real cohorts was confirmed to be a common trend among comparative countries. In addition, Japan and Korea have a higher life expectancy and starting from 85 to 90 years old, all comparative countries show that the growth rate for the life expectancy of synthetic and real cohorts is less than previous years.

• Journal of the Korean Geographical Society
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• v.46 no.2
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• pp.212-232
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• 2011

The main objective of this study is to establish a population projection method based on the biregional cohort-component method and to apply it to population projections for Busan. Some drawbacks of using the net migration cohort-component method in a regional or local level population projection are demonstrated. A biregional cohort-component method, a variant of the interregional cohort-component method, is established as an alternative where in-migration and out-migration are separately considered and then are combined to produce a projection for the migration component. Predicated on the established method, population projections for Busan are undertaken for the period of 2005~2030 under three different scenarios. Considerably different projection results are obtained between the net migration and biregional methods; among others, the trend of population decline is more severe in the former than in the latter. An investigation of the temporal trend of the projected population shows that the proposed method is highly reasonable. In conclusion, the proposed method based on the biregional cohort-component method seems not only to be theoretically more robust than the net migration cohort-component method but also to be very effective in the real world application.