Association Between Convenience of Transportation and Unmet Healthcare Needs of Rural Elderly in Korea

Choi, Youngeun,Nam, Kiryong,Kim, Chang-yup The Korean Society for Preventive Medicine 2019 Journal of Preventive Medicine and Public Health Vol.52 No.6

Objectives: In rural areas of Korea, where public transportation infrastructure is lacking and alternative systems are poor, the elderly experience inconveniences in using healthcare, although their need is high. This study aimed to analyze the association between the convenience of transportation and unmet healthcare needs among the rural elderly. Methods: The data used were collected in the 2016 Community Health Survey among rural elderly individuals aged 65 or older. Dependent variable was the unmet healthcare needs, explanatory variable was the convenience of transportation. The elderly were divided into 3 groups: with no driver in the household, with a driver, and the elderly individual was the driver (the self-driving group). Covariates were classified into predisposing, enabling, and need factors. They included gender, age, education, income, economic activity, household type, motor ability, subjective health level, number of chronic diseases, anxiety/depression, and pain/discomfort. The data were analyzed using logistic regression and stratification. Results: A significant association was found between the convenience of transportation and unmet healthcare needs. When examined unadjusted odds ratio of the group with a driver in the household, using the group with no driver as a reference, was 0.61 (95% confidence interval [CI], 0.54 to 0.68), while that of the self-driving group was 0.34 (95% CI, 0.30 to 0.38). The odds ratios adjusted for all factors were 0.69 (95% CI, 0.59 to 0.80) and 0.79 (95% CI, 0.67 to 0.91). Conclusions: We confirmed a significant association between inconvenient transportation and unmet healthcare needs among the rural elderly even after adjustment for existing known factors. This implies that policies aimed at improving healthcare accessibility must consider the means of transportation available.

Silk fibroin particles as templates for mineralization of calcium‐deficient hydroxyapatite

Choi, Youngeun,Cho, Se Youn,Park, Doo Jin,Park, Hyun Ho,Heo, Semi,Jin, Hyoung‐,Joon Wiley Subscription Services, Inc., A Wiley Company 2012 Journal of Biomedical Materials Research Part B Vol. No.

<P><B>Abstract</B></P><P>Silk fibroin particles prepared by phase separation with polyethylene oxide were coated with calcium‐deficient hydroxyapatite (CDHA) crystals under various pH conditions. For different pH values, the growth and the morphology of CDHA crystals on the surface of silk fibroin particles were investigated in detail by zeta potential analysis, scanning electron microscopy, transmission electron microscopy, and X‐ray diffraction techniques. Negative charges formed by deprotonation of the functional groups on the surface of silk fibroin particles at high pH lead to an increase of binding affinity between the calcium ions of the CDHA crystals and the functional groups of the silk fibroin particles. Consequently, the generation of many CDHA crystals was promoted to deposit on the surface of silk fibroin particles at a high pH value. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2012.</P>

The Examination of Future Climate Extreme Events Over the Republic of Korea Using High Resolution Climate Change Scenario

Choi Youngeun,Lee Sangmin,Lee Hansu,Kim Yujin 대한지리학회 2011 대한지리학회 컨퍼런스 자료집 Vol.- No.6

Design and Construction of a Heme-Sensing Genetic Circuit for in vivo Fecal Occult Blood Test by Probiotics

Youngeun CHUN,Uijin HAN,Jungwon CHOI,Chaeyeon HAN,Juwhee PARK,Hyemin SA,Jeongwon SON,In-Geol CHOI 한국생물공학회 2018 한국생물공학회 학술대회 Vol.2018 No.10

Pentacene Crystal Formation on the Surface of Silk Fibroin Films

Choi, Youngeun,Yun, Young Soo,Cho, Se Youn,Lee, Min Eui,Jin, Hyoung-Joon 한국섬유공학회 2013 FIBERS AND POLYMERS Vol.14 No.12

Silk fibroin (SF) has attracted interest as a gate dielectric due to its electrical insulation and high mobility in pentacene based organic thin film transistors (OTFTs). In this research, the surface energy of SF is controlled by water annealing, ethanol, and methanol solution treatments in order to study the effect of pentacene morphology on SF thin films with various treatments. For different crystallization methods, the crystal structures and surface energies of SF were investigated in detail by FT-IR and contact angle. Methanol treated SF thin film has a lower surface energy than the other two thin films. Topologies of pentacene on the SF thin films with various surface energies were obtained by atomic force microscopy (AFM). The AFM results showed that the smallest grain size of pentacene was that on methanol treated SF thin film which demonstrated that methanol treated SF thin film can be a proper candidate for a gate dielectric in OTFTs.

ESTIMATING AND CORRECTING URBAN BIAS IN SURFACE TEMPERATURE TIME SERIES OF KOREA

Youngeun Choi,Hyun-Sook Jung,Won-Tae Kwon,Kyung-Yub Nam 한국기상학회 2001 대기 Vol.11 No.1

Association Between Convenience of Transportation and Unmet Healthcare Needs of Rural Elderly in Korea

Youngeun Choi,Kiryong Nam,Chang-YupKim 대한예방의학회 2019 Journal of Preventive Medicine and Public Health Vol.52 No.6

Objectives: In rural areas of Korea, where public transportation infrastructure is lacking and alternative systems are poor, the elderly experience inconveniences in using healthcare, although their need is high. This study aimed to analyze the association between the convenience of transportation and unmet healthcare needs among the rural elderly. Methods: The data used were collected in the 2016 Community Health Survey among rural elderly individuals aged 65 or older. Dependent variable was the unmet healthcare needs, explanatory variable was the convenience of transportation. The elderly were divided into 3 groups: with no driver in the household, with a driver, and the elderly individual was the driver (the self-driving group). Covariates were classified into predisposing, enabling, and need factors. They included gender, age, education, income, economic activity, household type, motor ability, subjective health level, number of chronic diseases, anxiety/depression, and pain/discomfort. The data were analyzed using logistic regression and stratification. Results: A significant association was found between the convenience of transportation and unmet healthcare needs. When examined unadjusted odds ratio of the group with a driver in the household, using the group with no driver as a reference, was 0.61 (95% confidence interval [CI], 0.54 to 0.68), while that of the self-driving group was 0.34 (95% CI, 0.30 to 0.38). The odds ratios adjusted for all factors were 0.69 (95% CI, 0.59 to 0.80) and 0.79 (95% CI, 0.67 to 0.91). Conclusions: We confirmed a significant association between inconvenient transportation and unmet healthcare needs among the rural elderly even after adjustment for existing known factors. This implies that policies aimed at improving healthcare accessibility must consider the means of transportation available.

Recent Trends on Temperature and Precipitation Extreme Events in South Korea

CHOI Youngeun 대한지리학회 2008 대한지리학회 컨퍼런스 자료집 Vol.2 No.-

Off-site 수소충전소의 FTA분석

최영은(Youngeun Choi),오기쁨(KiPpeum Oh),이광원(KwangWon Rhie),김태훈(TaeHun Kim),서두현(DooHyoun Seo) 한국가스학회 2018 한국가스학회 학술대회논문집 Vol.2018 No.11

제주국제공항의 항공기 지연요인 분석

최영은(CHOI, Youngeun),양봄이(YANG, Bomyi) 대한교통학회 2021 대한교통학회지 Vol.39 No.2

최근 제주국제공항은 이용객 증가에 따른 공항의 혼잡 및 항공기 지연이 극심해지고 있는 추세이다. 2019년 기준 전체 운항편의 약 14.1%에 해당하는 24,052편의 항공기에서 지연이 발생하였으며, 이는 전국공항의 평균 지연율인 9% 대비 약 1.5배 높은 수준이다. 특히 출발항공기 지연율은 국내공항 출발항공기 평균인 9.91%의 약 2.2배 수준인 21.3%로 제주국제공항의 지연은 매우 심각한 수준이다. 이러한 지연 증가의 원인으로는 활주로 용량 포화, 불량한 기상여건, 시설배치 한계 등이 언급되고 있으나 실제로 이러한 요인들이 항공기 지연 여부에 미치는 영향에 대한 실증적 연구는 부족한 실정이다. 이에 본 연구에서는 2019년 1년간 제주국제공항의 항공기 운항일지(Tower-log) 자료와 항공기상청의 제주국제공항 공항기후통계 자료를 활용하여 공항의 운영특성(일운항횟수, 시간당운항횟수 등)과 각종 기상현상(풍속, 시정, 강우량 등), 항공기 운항 특성(운항노선, 항공기 탑승율 등)이 항공기의 지연 여부 및 지연시간에 미치는 영향을 분석하였다. 분석 결과, 일운항횟수, 시간당 운항횟수, 운항시간대, 강수량, 풍속, 운항노선, 항공기 탑승률과 같은 다양한 변수가 항공기 지연에 통계적으로 유의한 영향을 미치는 것으로 나타났으며, 변수의 상대적 중요성은 일운항횟수, 풍속, 시정, 항공기 탑승률의 순으로 확인되었다. 또한 이러한 변수들은 항공기의 지연시간에도 통계적으로 유의한 영향을 미치는 것으로 분석되었다. 본 연구의 결과는 공항의 계획 수립 및 운영단계에서 항공기 지연 관리, 그리고 공항부문 사업의 타당성조사 방법론 개선 등에 기초 자료로 활용될 수 있을 것이다. Jeju International Airport is experiencing heavy congestion and delays due to the rapid increase of passengers. As of 2019, delays occurred in 24,052 aircraft, which account for over 14% of all flights operated. This delay rate is about 1.5 times higher than the average delay rate of 9% at domestic airports. The factors which bring delays at Jeju International Airport may include saturation of runway capacity, poor weather conditions, and limitations in facility layout. However, there are insufficient empirical studies on how these factors have affected aircraft delays. This study analyzed the effects of airport operation characteristics, weather conditions, and aircraft operation characteristics on aircraft delay using tower-log data of Jeju International Airport and Aeronautical Climatological Statistics of Jeju International Airport of Aviation Meteorological Office. The result of the analysis shows, aircraft movements per day, aircraft movements per hour, time of day, wind, route and aircraft occupancy rate have a statistically significant effect on aircraft delay, and the relative importance of variables appeared in the order of aircraft movements per day, wind, visual, and aircraft occupancy rate. In addition, these variables were analyzed to have a statistically significant effect on the delay time of aircraft. The results of this research are expected to be used as a basic data for aircraft delay management in airport planning and operation, and contribute to improve methodology of the feasibility study for airport projects.