• 한국학교보건학회지
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• 제31권3호
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• pp.135-145
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• 2018

Purpose: The study aimed to investigate the factors associated with long hours of smartphone usage and to identify the characteristics of the high-risk group among female middle school students in South Korea. Methods: The study analyzed the data of 13,648 female middle school students using their own smartphone extracted from the 13th Youth Health Behavior Online Survey (2017). The factors related to using smartphones for a long time was analyzed by binomial logistic regression. The characteristics of the high-risk group was defined by a decision tree analysis. Results: The average hours spent on smartphone usage was 269.54 minutes per day. The significant factors associated with the long hours of smartphone usage were grade, living with parents, perceived household economic status, perceived academic achievement, stress, sadness and hopelessness, the main purpose of smartphone usage, drinking, body mass index, breakfast, and satisfaction with sleep quality. The subjects showing low academic performance and having breakfast four times a week or less were more likely to use their smartphone for a long time. Conclusion: Based on the results of the research, we need to establish intervention strategies focusing on the factors influencing long-time usage of smartphone. Particularly, the subjects who show poor academic performance and skip breakfast frequently should be considered as the high-risk group for spending long hours on smartphone usage.

• 한국동물위생학회지
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• 제31권4호
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• pp.497-504
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• 2008

A cross-sectional study was undertaken to report prevalence and to identify risk factors of subclinical mastitis of dairy cattle in Sylhet district of Bangladesh. Among 325 dairy farms of the district 12 farms(3.7%) were selected conveniently for this study. All the dairy cows of the 12 farms were selected for sample collection. Fresh milk samples from each of the selected dairy cows were collected aseptically in separate sterilized test tube as RF, RH, LF and LH quarter of the udder. Rapid modified White Side Test(WST) was used to detect subclinical mastitis(SCM). Results of WST and data derived from filled in questionnaire were entered in Microsoft Excel 2003 and transferred to $STATA^{(R)}$, version 8.0/Intercooled(Stata Corporation, Texas, USA, 2003). The overall prevalence of SCM and its distribution in different categories of variables in cow and their exact binomial 95% confidence intervals were calculated in $STATA^{(R)}$. Simple bivariable associations among independent variables were investigated by $x^2$ test in $STATA^{(R)}$. Multiple logistic regression analysis with backward elimination method was used to identify risk factors of SCM. To identify significant variation in quarter SCM, linear regression analysis was performed after arcsine transformation of the data. The overall prevalence of SCM found in this study is 54%. Dairy cows with teat lesions had significantly increased SCM(OR=12342, P value=0.000, 95% CI=762, 199798) than others without teat lesions. The Holstein Friesian X Jersey X Sahiwal breed has significantly decreased(OR=0.18, p=0.03, 95% CI 0.04, 0.85) SCM than other breeds. The prevalence of SCM found in this study is in agreement with others. The injury in the teat increases the probability of getting infected with microbes and thereby mastitis. If the prevalence of teat lesion can be decreased the probability of subclinical mastitis will also be decreased. The negatively associated Holstein Friesian X Jersey X Sahiwall breed may help in planning mastitis control program if this finding can be validated by a more powerful case-control or cohort study design.

• 한국산학기술학회논문지
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• 제21권2호
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• pp.565-577
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• 2020

본 연구는 기업규모와 전유성 등의 기술전략이 기업 혁신활동을 결정짓는 데 대한 영향을 실증적으로 분석해보았다. 한국기술혁신조사(KIS)의 2016년 2,003개 제조업체의 자료로 로짓회귀모형과 영과잉음이항회귀를 활용하였다. R&D 지출과 특허출원이 혁신활동의 성과를 나타내는 변수로서 이용되었다. 설명변수로서는 기업의 특성을 나타내는 기업 나이, 기술수준별 산업구분, R&D 종사자수, 벤처기업여부, 수출여부, 그리고 산업 전유 특성을 타나내는 네트워크, 전유방법, Spillover를 설정하였다. 우선, 실증적인 분석결과는 전반적으로 기업의 규모에 따라 혁신활동 결정요인이 다르게 나타남을 보여주고 있다. 더욱이 혁신활동을 결정짓는 데에, 중소기업은 대기업보다 산업의 특성에 의해 유의미하게 영향을 받았다. 규모가 작은 신생기업, 벤처기업, 혹은 수도권 소재기업일 때 혁신활동에 긍정적인 것으로 나타났다. 반면, 전략적 전유는 소기업 R&D 지출과 중기업의 특허출원 성과에 부정적인 영향을 미치고 있다. 다른 기업 또는 산업 간의 네트워크는 대기업을 제외한 기업들에서 혁신활동을 결정짓는 중요한 결정요인으로 나타나고 있다. 기업간의 기술적 상호작용은 기술 spillover과 혁신활동의 가능성을 높일 수 있으나, 이 성과는 기업 규모와 산업 특성에 따라 다르게 나타날 수 있음을 보여준다.

• Journal of Gastric Cancer
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• 제21권4호
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• pp.352-367
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• 2021

Purpose: Minimally invasive gastrectomy is a promising surgical method with well-known benefits, including reduced postoperative complications. However, for total gastrectomy of gastric cancers, this approach does not significantly reduce the risk of complications. Therefore, we aimed to evaluate the incidence and risk factors for the severity of complications associated with minimally invasive total gastrectomy for gastric cancer. Materials and Methods: The study included 392 consecutive patients with gastric cancer who underwent either laparoscopic or robotic total gastrectomy between 2011 and 2019. Clinicopathological and operative characteristics were assessed to determine the features related to postoperative complications after minimally invasive total gastrectomy. Binomial and multinomial logistic regression models were used to identify the risk factors for overall complications and mild and severe complications, respectively. Results: Of 103 (26.3%) patients experiencing complications, 66 (16.8%) and 37 (9.4%) developed mild and severe complications, respectively. On multivariate multinomial regression analysis, independent predictors of severe complications included obesity (OR, 2.56; 95% CI, 1.02-6.43; P=0.046), advanced stage (OR, 2.90; 95% CI, 1.13-7.43; P=0.026), and more intraoperative bleeding (OR, 1.04; 95% CI, 1.02-1.06; P=0.001). Operation time was the only independent risk factor for mild complications (OR, 1.06; 95% CI, 1.001-1.13; P=0.047). Conclusions: The risk factors for mild and severe complications were associated with surgery, indicating surgical difficulty. Surgeons should be aware of these potential risks that are related to the severity of complications so as to reduce surgery-related complications after minimally invasive total gastrectomy for gastric cancer.

• Journal of Preventive Medicine and Public Health
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• 제55권4호
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• pp.342-350
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• 2022

Objectives: Human immunodeficiency virus (HIV) prevention among youth seems under-prioritised compared to other key populations. HIV knowledge and stigma are important parts of HIV prevention. To inform HIV prevention among youths, this study quantitatively analysed the associations between open communication regarding sexuality and sexual health, comprehensive HIV knowledge, and non-stigmatising attitudes in Indonesia. Methods: This study used data from the Indonesian Demographic and Health Survey (IDHS) 2017. The analysis included unmarried men and women aged 15-25 years old. Comprehensive HIV knowledge and a stigmatising attitude were defined according to the IDHS 2017. Open communication about sexuality and sexual health was defined as the number of people with whom participants could openly discuss these topics in their direct network of friends, family, and service providers, with a scale ranging from 0 to a maximum of 7. Primary analysis used binomial logistic regression with weighting adjustments. Results: The final analysis included 22 864 respondents. Twenty-two percent of youth had no one in their direct network with whom to openly discuss sexual matters, only 14.1% had comprehensive HIV knowledge, and 85.9% showed stigmatising attitudes. Youth mostly discussed sex with their friends (55.2%), and were less likely to discuss it with family members, showing a predominant pattern of peer-to-peer communication. Multivariate analysis showed that having a larger network for communication about sexuality and sexual health was associated with more HIV knowledge and less stigmatising attitudes. Conclusions: Having more opportunities for open sex communication in one's direct social network is associated with more HIV knowledge and less stigmatising attitudes.

• 지역사회간호학회지
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• 제27권2호
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• pp.95-105
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• 2016

Purpose: This study examined the characteristics differences associated with 1-year continuous smoking abstinence in Korean young adult and middle-aged male workers. Methods: 'Korea National Health and Nutrition Examination Survey (KNHANES)' is an ongoing surveillance system that assesses the health and nutritional status of Koreans. For a secondary analysis of cross-sectional data from KNHANES VI-1, this study selected 683 Korean male workers as a subpopulation, who were young adult or middle-aged. The subpopulation was composed of success or failure group of 1-year continuous smoking abstinence. Binomial logistic regression analysis was performed. Results: Success group was more likely to be older, live in urban areas, rate their health status as excellent or good, and have ever been diagnosed with hypertension than failure group. Additionally, Success group was less likely to have used electronic cigarettes (e-cigarettes), drink more than once a month, and have been exposed to secondhand smoking in workplace within a week. Conclusion: Developing smoking cessation programs requires consideration of resources in rural areas, promoting self-efficacy, restricting e-cigarettes and drinking, and promoting a smoke-free workplace.

• 한국콘텐츠학회논문지
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• 제18권12호
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• pp.526-534
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• 2018

본 연구는 시간에 따른 장애인의 직장차별 변화정도를 유형화하고, 각 유형별로 생활만족도에 영향을 미치는 요인을 규명하는데 목적이 있다. 이를 위해 장애인고용패널 3~8차년도 자료를 활용하였고, 1,227명의 데이터를 활용하였다. 잠재프로파일성장분석을 통해 장애인의 직장차별의 종단적 변화유형을 구분하였고, 이후 집단별로 이항로지스틱회귀분석을 통해 영향요인을 검증하였다. 분석결과, 첫째, 장애인의 직장차별 변화유형은 감소집단과 증가집단으로 나타났고, 직장차별에 영향을 미치는 요인은 장애정도, 만성질병 유무, 총소득, 생활만족도이었다. 둘째, 장애인의 직장차별 유형별 삶의 만족도를 예측하는 요인을 살펴보면, 직장차별과 감소집단과 증가집단은 공통적으로 자아존중감과 사회경제적지위가 높을수록 삶의 만족도가 높았다. 이러한 결과를 바탕으로 본 연구는 장애인 직장차별에 대응하기 위해 본 연구가 갖는 함의를 제시하였다.

• Journal of Preventive Medicine and Public Health
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• 제55권2호
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• pp.193-204
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• 2022

Objectives: The primary objective of this study was to examine the effect of women's empowerment on the immunization of Indonesian children. The secondary objective was to examine the effect of wealth as a factor modifying this association. Methods: We utilized data from the 2017 Indonesian Demographic and Health Survey (IDHS). The subjects were married women with children aged 12-23 months (n=3532). Complete immunization was defined using the 2017 IDHS definition. Multiple components of women's empowerment were measured: enabling resources, decision-making involvement, and attitude toward intimate partner violence. The primary analysis was conducted using binomial logistic regression. Model 1 represented only the indicators of women's empowerment and model 2 controlled for socio-demographic variables. Subgroup analyses were conducted for each wealth group. Results: The primary analysis using model 1 identified several empowerment indicators that facilitated complete immunization. The analysis using model 2 found that maternal education and involvement in decision-making processes facilitated complete immunization in children. Subgroup analyses identified that wealth had a modifying effect. The indicators of women's empowerment were strong determinants of complete immunization in lower wealth quintiles but insignificant in middle-income and higher-income quintiles. Conclusions: To our knowledge, this study is the first to explore women's empowerment as a determinant of child immunization in Indonesia. The results indicate that women's empowerment must be considered in Indonesia's child immunization program. Women's empowerment was not found to be a determinant in higher wealth quintiles, which led us to rethink the conceptual framework of the effect of women's empowerment on health outcomes.

• 디지털융복합연구
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• 제15권4호
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• pp.117-125
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• 2017

본 연구는 중소기업의 기술혁신을 유도하기 위한 정부의 정책 수단인 연구개발지원과 규제장벽이 실제 중소기업의 기술혁신에 미치는 영향에 대한 고찰을 목적으로 한다. 대부분의 기존 연구들은 연구개발지원에 대한 내생성을 고려하지 않았으며, 규제의 경우 연구자마다 상이한 결론을 도출하였기 때문에 이를 극복하기 위하여 실증적 연구를 추진하였다. 중소기업 1,223개를 대상으로 연구를 추진하여, 로직분석, 음이항분석, 2SLS분석을 수행하였다. 분석결과는 첫째, 정부연구개발지원의 내생성을 고려하여도 실제 기술혁신효과가 존재하는 것으로 나타났고, 둘째, 규제가 기술혁신에 긍정적인 영향을 미치는 것으로 나타나 Porter의 이론을 지지하였다. 이와 같은 결과는 다음과 같은 시사점을 갖는다. 중소기업이 가지는 기술개발 환경의 취약성 때문에 정부의 연구개발지원은 기술혁신 유도에 있어 중요한 역할을 한다는 것이다. 그리고 정부는 무조건적인 규제 철폐보다는 중소기업에 대한 지원과 더불어 적절한 규제를 추진하는 정책을 통해 중소기업의 기술혁신을 육성해야 한다고 판단할 수 있다.

• Journal of Radiation Protection and Research
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• 제47권2호
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• pp.67-76
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• 2022

Background: We conducted a cross-sectional study of residents within and outside Fukushima Prefecture to clarify their perceptions of the need for smartphone applications (apps) for explaining exposure doses. The results will lead to more effective methods for identifying target groups for future app development by researchers and municipalities, which will promote residents' understanding of radiological situations. Materials and Methods: In November 2019, 400 people in Fukushima Prefecture and 400 people outside were surveyed via a web-based questionnaire. In addition to basic characteristics, survey items included concerns about radiation levels and intention to use a smartphone app to keep track of exposure. The analysis was conducted by stratifying responses in each region and then cross-tabulating responses to concerns about radiation levels and intention to use an app by demographic variables. The intention to use an app was analyzed by binomial logistic regression analysis. Text-mining analyses were conducted in KH Coder software. Results and Discussion: Outside Fukushima Prefecture, concerns about the medical exposure of women to radiation exceeded 30%. Within the prefecture, the medical exposure of women, purchasing food products, and consumption of own-grown food were the main concerns. Within the prefecture, having children under the age of 18, the experience of measurement, and having experience of evacuation were significantly related to the intention to use an app. Conclusion: Regional and individual differences were evident. Since respondents differ, it is necessary to develop and promote app use in accordance with their needs and with phases of reconstruction. We expect that a suitable app will not only collect data but also connect local service providers and residents, while protecting personal information.