Publications by authors named "Ji-Hyuk Park"

Previous research has extensively explored cognitive and neural deficits in clinically diagnosed depression, but the early stages of depression, where symptoms do not meet clinical thresholds, are less explored. This study investigated neurocognitive markers in individuals with non-clinical depression. The study assessed working memory (WM) performance and hemodynamic responses of prefrontal cortex (PFC) in 30 individuals with non-clinical depression and 41 healthy controls using two-back tasks with four stimulus types: numbers, letters, shapes, and emotional facial expressions.

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This study aimed to evaluate the effectiveness of our newly developed virtual reality head-mounted display (VR-HMD) "walker avoidance" game in reducing step-aside reaction time (SART) and enhancing agility in collision avoidance. Fifteen young adults in experimental group (EG) engaged in the "walker avoidance" game, while another 15 young adults in the control group (CG) played the "first touch" tutorial. The results showed the EG had significant decreases (p < 0.

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Article Synopsis
  • - This study focuses on the Yonsei Lifestyle Profile-Active, Balance, Connection, Diversity (YLP-ABCD) to assess health-related lifestyles in individuals aged 55 and older, emphasizing the importance of lifestyle choices in health maintenance.
  • - Data from 300 participants were analyzed using various statistical methods to validate the tool's reliability and effectiveness, revealing that the YLP-ABCD demonstrates solid measurement properties overall.
  • - The findings endorse the YLP-ABCD as a useful instrument for measuring diverse lifestyles, aiming to enhance our understanding and improve health outcomes in the target population.
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Background: The coronavirus disease (COVID-19) pandemic has greatly impacted older adults, resulting in many deaths. The impact of lifestyle and mental health on vulnerable groups, such as older adults, can be large and long lasting. Therefore, this study aimed to investigate the effects of COVID-19 confirmation on cognition, lifestyle, mental health, and quality of life in adults aged 55 years.

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  • * Case studies involved collecting stool and food samples, which revealed Salmonella Enteritidis contamination in food handlers, patients, and iceberg lettuce from restaurant A. All isolates showed a similar genetic pattern, indicating a common source.
  • * The suspected source of the outbreaks was contaminated eggs supplied to both restaurants, highlighting the need for better cooking practices and management systems in egg production to prevent future infections.
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Obesity is a serious global health challenge, closely associated with numerous chronic conditions including type 2 diabetes. Bunge (AA) known as Jimo has been used to address conditions associated with pathogenic heat such as wasting-thirst in Korean Medicine. Timosaponin A3 (TA3), a natural compound extracted from AA, has demonstrated potential therapeutic effects in various disease models.

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This study assesses the effect of a cognitive program with a comprehensive strategy feedback on the cognitive function and memory self-efficacy of community-dwelling older adults and explores its applicability in Korea. The study employed a group pre-posttest design on 10 cognitively normal older participants. The four-week cognitive program involved daily completion of cognitive tasks at home using CoTras-Pro 2 and remotely provided individual non-face-to-face feedback.

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  • This study examined how lifestyle factors like physical activity and social engagement affect cognitive decline in different age groups of older adults (young-old, middle-old, and old-old).
  • It found that smoking worsened cognitive decline in younger older adults, while social activities helped middle-aged older adults slow their decline; however, no lifestyle changes were effective for the oldest age group.
  • The study suggests tailored strategies for different age groups could help maintain cognitive health, emphasizing smoking cessation for young-old individuals and social engagement for middle-old individuals.
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There is no comprehensive predischarge occupational therapy assessment tool in South Korea. The objective of this study was to determine Stroke-Predischarge Occupational Therapy Assessment (S-POTA) validity and reliability. Twenty-seven occupational therapists (OTs) assessed 97 patients with stroke.

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Background: Motoric cognitive risk syndrome (MCR) reduces the quality of life, independence, and social interaction in older adults. Social participation is a potentially modifiable factor that benefits cognitive and mental health. This study explored the mediating roles of social participation between MCR and depression and between MCR and loneliness.

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Objective: Patients with coronavirus disease experience deterioration in occupational balance and mental health. The primary objective of this study was to determine the effectiveness of a time-use intervention on the occupational balance of isolated patients with coronavirus disease. Its impact on secondary outcomes including mental health and quality of life was also assessed.

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  • Human Q fever is a zoonotic disease that can cause a range of symptoms, from mild fever to severe complications like endocarditis and can sometimes lead to chronic cases that may be fatal if untreated.
  • Following a significant outbreak in the Netherlands, there are concerns about potential transmission through blood transfusions and risks for pregnant women.
  • In South Korea, Q fever has been a classified notifiable disease since 2006, with a noticeable increase in cases since 2015, highlighting the need for better recognition and preventive strategies, including a One Health approach.
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Background: Job satisfaction is a highly useful factor in maintaining a successful work life for the disabled.

Objective: This study aimed to evaluate how job satisfaction among workers with physical disabilities evolves over time, and to identify predictive factors that influence the trajectory of job satisfaction.

Methods: A longitudinal data analysis using the three-year databases of the 2016-2018 Employment Panel Survey for the Disabled (n = 693).

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  • * Results showed that females had a longer HALE in physical activity while males excelled in nutrition; those in rural areas had the longest HALE across all lifestyle domains.
  • * High school graduates had the highest HALE scores, indicating that education significantly influences health outcomes as people age, which could guide future research on healthy lifestyles.
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The aim of this study is to evaluate the item-level psychometrics of the Ascertain Dementia Eight-Item Informant Questionnaire (AD-8) by examining its dimensionality, rating scale integrity, item fit statistics, item difficulty hierarchy, item-person match, and precision. We used confirmatory factor analysis and the Rasch rating scale model for analyzing the data extracted from the proxy versions of the 2019 and 2020 National Health and Aging Trends Study, USA. A total of 403 participants were included in the analysis.

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  • A study analyzed a COVID-19 outbreak in a taekwondo gym in Korea, focusing on children and adolescents, to identify risk factors and improve outbreak management.
  • COVID-19 was confirmed in 30 out of 108 individuals, highlighting that younger age and consuming food inside the gym increased the risk of transmission.
  • The study concludes that banning food consumption in such facilities and providing infection prevention education for young students are essential to reduce transmission risks.
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Objective: The purpose of this study is to identify lifestyle factors that affect the subjective health conditions of adolescents in South Korea by utilizing data from the Korean Children's and Youth Panel Survey 2018 conducted in Korea.

Methods: This cross-sectional study used data from 4,490 students (2,399 students in the fourth grade of elementary school and 2,541 students in the first grade of middle school). The data obtained were evaluated using living time (sleep time, study time, leisure time), emotions (happiness, self-esteem, emotional problems), capabilities (cooperative attitude, grit), health (life satisfaction, exercise time, number of breakfasts, quality of sleep), media (smartphone use and dependence), school (school life satisfaction, relationship with friends and teachers), and home (time spent with parents, parenting attitude).

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The incidence of Q fever has rapidly increased in South Korea since 2015. This study was undertaken to investigate the seroprevalence and seroreactivity of Q fever and the risk factors associated with its seroprevalence among workers in the veterinary service laboratory (VSL) in South Korea. This seroepidemiologic study was conducted in a total of 661 human subjects out of 1,328 subjects working in 50 VSL existing in South Korea between July 15 and July 29, 2019.

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Article Synopsis
  • - This study analyzed the lifestyles of middle- and older-aged adults, focusing on physical activity, participation in activities, and nutrition among 569 participants with an average age of 60.2.
  • - Three lifestyle profiles were identified: "inactive and unbalanced" (36.4%), "basic life maintenance" (54.6%), and "active and balanced" (9.1%), with notable demographic differences among these groups.
  • - The study found that those with active and balanced lifestyles had significantly better quality of life and mental health, suggesting that targeted health promotion could enhance well-being in older adults in South Korea.
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Background: The World Health Organization declared COVID-19 a global pandemic on 11 March 2020, due to the number of newly reported confirmed cases and the rapid increase in deaths. Therefore, countries around the world limited their population to policies such as "social distancing" or "staying at home" to prevent the spread of the virus. The purpose of this study was to evaluate differences in lifestyle pre and post the outbreak COVID-19 among older adults in South Korea and to identify the impact of lifestyle differences on depression and quality of life.

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Lifestyle plays an important role in determining health and vitality among older adults. However, there is limited evidence regarding lifestyle assessment. This study examined the psychometric properties of the Yonsei Lifestyle Profile-Satisfaction (YLP-S).

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Limited data are available on the current status of Lyme disease in South Korea. The aim of this study was to investigate the seroprevalence and risk factors associated with Lyme disease infection among forestry workers in National Park Offices in South Korea. We enrolled National Park Office forestry workers (NPOFWs) who had worked for ≥1 year.

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Scrub typhus is caused by the arthropod-borne bacterium and is an endemic infectious disease in the Asia-Pacific area. This study aimed to investigate the seroprevalence of scrub typhus and identify associated risk and protective factors among forestry workers, a neglected risk group for scrub typhus, in National Park Offices in South Korea. A nationwide cross-sectional serosurvey was carried out on 1945 National Park Office forestry workers (NPOFWs) in South Korea during December 2016.

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Article Synopsis
  • - The study aimed to understand how the COVID-19 pandemic affected the lifestyles, mental health, and overall quality of life of South Korean adults aged 20 and older, focusing on changes due to government-mandated stay-at-home strategies and social distancing.
  • - Researchers conducted an online survey with 104 participants between August and October 2020, using established scales to evaluate lifestyle changes, depression levels, and quality of life before and after the pandemic.
  • - Findings revealed significant declines in physical activities, social engagement, and mental health, although nutritional habits remained mostly stable, with slight changes in carbohydrate and mineral intake; results are intended to guide health policymakers in future pandemic responses.
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