Sung-In Jang

Sung-In Jang
Yonsei University Hospital | YUHS · Department of Internal Medicine

M.D.

About

167
Publications
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947
Citations

Publications

Publications (167)
Article
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Although previous studies have demonstrated increased depression related to COVID-19, the reasons for this are not well-understood. We investigated the association of compliance with COVID-19 public health measures with depression. Data from the 2020 Korea Community Health Survey were analyzed. The main independent variable was compliance with rule...
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This study aimed to examine the association between lifestyle factors and metabolic syndrome risk in South Korean adults. Korea National Health and Nutrition Examination Survey 2016–2018 data were used. The study included 6,995 subjects (2835 male; 4,160 female). Multiple logistic regression was used to estimate the relationship between the lifesty...
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We investigated the association between working status changes and hand-grip strength (HGS) among middle-aged and older Korean adults using data from the 2006–2018 Korean Longitudinal Study of Aging. After excluding those with less than normal HGS in the baseline year, newly added panels, and missing values, 3843 participants (2106 men; 1737 women)...
Preprint
Background: Studies investigating the association between migraine and dementia have reported inconsistent findings. This study aimed to evaluate whether patients with migraine have an increased risk of dementia compared to individuals without migraine. Methods: We obtained data from the 2002–2019 Korean National Health Insurance Health Screening C...
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Purpose: The purpose of our study was to evaluate the relationship between benign anal inflammatory diseases and anorectal cancer and assess its risk factors. Methods: A retrospective matched cohort study was conducted that included data from 2002 to 2013. The National Health Insurance Service National Sample Cohort data from 2002 to 2013 was us...
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Background Depression is a common mental health disorder. Despite sleep disturbance being associated with depression, limited data regarding the association of sleep quality with depression exists. We aimed to investigate the association between sleep quality and depressive symptoms in the South Korean population. Methods This cross-sectional stud...
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This study aimed to investigate the implementation of diabetes complications screening in South Korea during the coronavirus disease (COVID-19) outbreak. Data from the Korea Community Health Surveys conducted in 2019 and 2020 were used. This study included 51,471 participants. Multiple level analysis was used to investigate the relationships betwee...
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Continuity of care and area deprivation have been implicated as possible risk factors of suicide in psychiatric patients. This nested case-control study aimed to examine the association between continuity of care and area deprivation and suicide completion in patients with psychiatric disorders. Data were collected from the Korean National Health I...
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This cross-sectional study identified the association between COVID-19-related perceived household financial decline and smartphone dependency among adolescents in South Korea. Data from the 2020 Youth Risk Behavior Survey of Korea was used and 54,809 middle and high school students were included. COVID-19-related perceived household financial decl...
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Insulin resistance can be affected directly or indirectly by smoking. This cross-sectional study aimed at examining the association between smoking patterns and insulin resistance using objective biomarkers. Data from 4043 participants sourced from the Korea National Health and Nutrition Examination Survey, conducted from 2016 to 2018, were examine...
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Graphic health warning labels on cigarette packs inform smokers about the health risks associated with tobacco smoking. Adolescents are generally the main targets to influence by graphic health warning labels. This study investigated the association between graphic health warning labels on cigarette packs and attempts to quit smoking in South Korea...
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Objectives: Anxiety disorder is among the most prevalent mental illnesses among adolescents. Early detection and proper treatment are important for preventing sequelae such as suicide and substance use disorder. Studies have suggested that sleep duration is associated with anxiety disorder in adolescents. In the present study, we investigated the...
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Diabetes is an ambulatory care sensitive condition that quality of care can prevent complications development and hospitalization needs. However, diabetes patients with disability face greater challenges with receiving quality diabetes care than those without disabilities. This study examined diabetes-related avoidable hospitalizations (DRAH) focus...
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Background Social phobia shares symptoms with arrhythmias, such as palpitations and chest discomfort. However, it is unclear how social phobia is associated with the actual risk of arrhythmia. This study aimed to investigate whether social phobia is associated with the risk of arrhythmia using a nationally representative sample cohort. Methods Thi...
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Appropriate nutrient intake is essential for maintaining health and resisting disease. The current study investigated the association between household income quintile and nutrient intake using data from KNHANES 2019. A total of 5088 South Korean adults were analyzed. The estimated average requirement cut-point method, extended to handle participan...
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In this study, we aimed to examine the association between tinnitus and depressive symptoms in middle-aged and elderly South Korean population. The participants were selected from among those who participated in the 2014, 2016, and 2018 Korea National Health and Nutrition Examination Surveys. The incidence and severity of tinnitus was assessed usin...
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Background Sleep problems increase the risk of premature illness and death. We evaluated the association between sedentary time and sleep quality among South Korean adults. Methods The data of adults (aged ≥ 19 years) from the 2018 Korea Community Health Survey were analyzed. Sedentary time, which included hours spent sitting or lying down daily,...
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Introduction Housing is an important social determinant of health. We investigated effects of changes in housing tenure and affordability on depressive symptoms. Methods Data of 9,956 individuals aged >20 years from the Korea Welfare Panel Study (2015–2020) were analyzed. Housing tenure was categorized as homeowners or tenants. Individuals with ho...
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Background Muscular function, such as handgrip strength, has been suggested as an associated factor for cognitive impairment. This study investigated the association between temporal change in handgrip strength and cognitive function using longitudinal, nationwide data from Korean older adults. Methods Our study used data from the Korean Longitudi...
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Background and Aims The effectiveness of statins commonly used to prevent stroke may depend on adherence to treatment. We examined the association between statin adherence and stroke risk among South Korean adults with hyperlipidemia. Methods and Results The data of 128,052 and 129,390 participants with hyperlipidemia for studying the risks of isc...
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Background The effect of menopausal hormone therapy (MHT) on gastrointestinal (GI) cancers is controversial, and no research has been conducted in the East. This study investigates the association between MHT and GI cancer risks in South Korea. Methods A prescription-based cohort study was conducted using the NHIS Sample Cohort (2002–2013) of Kore...
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In this cohort study, we assessed the association between depression and the risk of Alzheimer’s disease from data obtained from the 2002 to 2013 Korean National Health Insurance Service-Elderly Cohort Database, which accounts for 10% of the South Korean population aged > 60 years. A total 518,466 patients were included in the analysis and followed...
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Background It is unclear whether visual and hearing acuity are independently or synergistically associated with muscle strength. We aimed to examine the associations of visual and self-reported hearing acuity with low handgrip strength and the additive interaction between visual and hearing acuity on low handgrip strength in people over 60 years....
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Background Low socioeconomic status deemed by income-based measures is a risk factor for depression. Material hardship is commonly used as a multidimensional socioeconomic indicator to identify the struggles that low-income households encounter that are not captured by conventional income-based measures. The aim of this study was to examine the eff...
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Context Despite previous studies regarding the association between smoking and diabetes, the effects of electronic cigarettes and second-hand smoke (SHS) on glucose metabolism and insulin sensitivity have not been fully elucidated. Objective To examine the association of mixed electronic and conventional cigarette use and exposure to SHS with pred...
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Objectives Identifying whether the demand for medical services is catered to is an important issue. Given that depression is a major contributor to the overall global burden of disease, it could affect the use of healthcare. This study aims to examine the association between the severity of new-onset depression and unmet healthcare needs among Sout...
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Objectives: The aim of this study was to identify the association between cohabitation status and sleep quality in family members of people with dementia (PwDs). Methods: Data of 190 365 participants aged ≥19 years from the 2018 Korea Community Health Survey were analyzed. Participants were categorized according to their cohabitation status with...
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Background: A Korean hospitalist is a medical doctor in charge of inpatient care during hospital stays. The purpose of this study is to examine the patient satisfaction of hospitalist patients compared to non-hospitalist patients. Patient satisfaction is closely related to the outcome, quality, safety, and cost of care. Thus, seeking to achieve hi...
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Introduction: In South Korea, to improve the quality of medical services provided to stroke patients, stroke quality assessments have been implemented since 2006. To further promote improvement of care, financial incentives were introduced since 2012. This study aims to examine the association between stroke quality assessments and mortality withi...
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Background In the past decade, the Korean smoking rate has only decreased by 3%, despite several smoking control policies. There is a need for such policies to take smokers’ psychological characteristics into account. Depression is a well-known contributor to failed smoking cessation. This study aimed to examine the effect of smokers’ depression st...
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Background A victim of child abuse can often develop mental illness. The early detection of mental illness of children could be supported by observing sleep quality. Therefore, we examined the relationship between sleep quality and the changes in child abuse by the child’s own parents over the study period. Methods Data from the 2011–2013 Korean C...
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Background The importance of SA (Successful aging) has been emphasized in recent years, with focus shifting towards attaining healthier aging rather than longevity. However, the influence of SA and its changes on mental health such as depression remains a relatively unexplored area in gerontology. Therefore, we investigated the longitudinal associa...
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Background: Hypnotics, including benzodiazepines, are extensively and inappropriately prescribed for older people to treat anxiety and sleep disorders, despite the adverse health outcomes associated with their use. Objective: This study aimed to examine the association of the use of long- and short-acting hypnotics with the risk of Alzheimer's d...
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Objective: To examine the difference between hospitalist and non-hospitalist frequency of patient-doctor contact, duration of contact, cumulative contact time, and the amount of time taken by the doctor to resolve an issue in response to a medical call. Research Design and Measures: Data from 18 facilities and 36 wards (18 hospitalist wards and 18...
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Frailty is considered a multidimensional geriatric syndrome, manifested by the accumulation of age-associated deficits. The consequences of frailty transitions are still understudied. This study evaluated the influence of frailty transitions on cognitive function in the older adult population. We used data derived from the Korean Longitudinal Study...
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Background Depression is considered a predictive factor for cognitive impairments. At the same time, Parkinson's disease (PD) is a growing public health problem. The aim of this study is to examine the association between depression and PD risk among South Korean adults. Methods Data from 21,766 participants aged over 40, derived from the National...
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Depression among family caregivers is becoming an increasingly important issue due to a growing elderly population. This study aimed to examine the association of living with a patient with dementia and family caregivers’ depressive symptoms, among Korean adults. This study used the data of 371,287 participants after excluding those who indicated h...
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Electronic cigarette vaping has recently been chosen as a smoking alternative for those who want to quit smoking, but some of the electronic cigarette users use both traditional and electronic cigarettes (dual smoking) without stopping smoking. This study investigated the association between smoking behavior and metabolic syndrome among Korean adul...
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Importance: Assessment of whether past electronic cigarette (e-cigarette) use or initiating smoking with e-cigarettes is associated with suicidal behaviors among adolescents is needed to inform future research and public health interventions. Objective: To evaluate the association between starting smoking with e-cigarettes or conventional cigare...
Article
Introduction This study aimed to provide evidence for the need for social and welfare support in suicide prevention. Methods Data were collected from the Korean Welfare Panel Study, 2011–2016. The study sample consisted of 7504 people (male: 3080 and female: 4424; mean age: 54.4 ± 16.6), with annual follow‐ups until 2016. A generalized linear mixe...
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Background Housing is an important social determinant of health. Poor housing conditions are associated with a wide range of health conditions, including mental health. The study aimed to investigate the association between substandard housing and depression. Methods We used panel data collected by the Korea Welfare Panel Study and a sample drawn...
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Objectives: Recent studies have suggested that assessing handgrip strength (HGS) asymmetry together with HGS may be helpful for evaluating problems in geriatric patients. This study aimed to identify whether HGS asymmetry, weakness, or both were associated with depression in Korean older adults. Methods: This study included 4274 subjects from th...
Article
Objectives Whether the spouse's employment status would be associated with individual's mental health condition is uncertain. Therefore, the aim of this study was to investigate the effects of spouse's employment status on depression. Methods Data included the second to sixth wave of the Korean Longitudinal Study of Ageing (KLoSA). Depression was...
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This study identifies the effects of transitions in caregiving status on depressive symptoms among middle-aged or older adults who care for family members with limitations in activities of daily living (ADL). Data were collected from the 2006–2018 Korean Longitudinal Study of Aging. A total of 7817 subjects were included. On the basis of their care...
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Objectives This study investigated whether commensality (eating a meal with others) is associated with mental health (depression, suicidal ideation) in Korean adults over 19 years old. Methods Our study employed data from the sixth and seventh Korea National Health and Nutritional Examination Surveys (KNHANES) for 2013, 2015, and 2017. The study p...
Preprint
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Background: Depression and suicide in adolescents have become leading problems both from the public health and socioeconomic aspects. In this context, determining the connection between adolescent behaviour and depression, which can serve as the basis of strategies to reduce the prevalence of depression, is important. Here, we investigated the asso...
Preprint
Full-text available
Background: A victim of child abuse can often develop mental illness. The early detection of mental illness of children could be supported by observing sleep quality. Therefore, we examined the relationship between sleep quality and the changes in child abuse by the child’s own parents over the study period. Methods: Data from the 2011-2013 Korean...
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With nearly 10% of women consuming alcohol during pregnancy, fetal alcohol spectrum disorders (FASDs) are becoming an increasing concern for clinicians and policymakers interested in the field of healthcare. Known as the range of mental and/or physical disabilities that occur among individuals with prenatal alcohol exposure, FASDs can result in dys...
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Background: It remains unclear which anthropometric measure best predicts elevated high-sensitivity C-reactive protein (hs-CRP) levels. This study investigated the association and synergistic interaction of two obesity indices with elevated hs-CRP levels in a national sample of Korean adults, stratified by sex. Methods: The present cross-sectional...
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Abstract Epidemiological evidence has indicated that inflammatory markers and obesity are strongly correlated with insulin resistance (IR). However, there is a paucity of studies assessing the complex interaction between elevated hs-CRP and body mass index (BMI), particularly among Asians. This study investigated the additive interaction between hs...
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Background This study examines the effects of a shift in medical coverage, from National Health Insurance (NHI) to Medical Aid (MA), on health care utilization (measured by the number of outpatient visits and length of stay; LOS) and out-of-pocket medical expenses. Methods Data were collected from the Korean Welfare Panel Study (2010–2016). A tota...
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Exercise has been considered as treatment and a preventive modality to alleviate depressive symptoms, but sex differences regarding specific types of exercise in association with depression have not been clearly elucidated. Here, we investigated sex differences in the association between exercise type and depression in Korean adults. Data from the...
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Background: To examine the association between sitting time and non-alcoholic fatty liver disease among South Koreans aged ≥20 years. Methods: Data from the 2016-2018 Korea National Health and Nutrition Examination Survey were used for the analysis. Non-alcoholic fatty liver disease was diagnosed according to a hepatic steatosis index of > 36. S...
Article
Background Using the Alcohol Use Disorders Identification Test-Korean revised version (AUDIT-KR), we examined the association between habitual alcohol use and risk-taking behaviors among car users. Methods We used the data of 15,043 car users aged 20 years or older from the Korea National Health and Nutrition Examination Survey (KNHANES) conducted...
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Background Many studies have reported noticeable increases in the proportion of employees working either relatively short or relatively long hours. Such trends have been accompanied by an increasing concern regarding work hour mismatches defined as a discrepancy between actual and preferred work hours. The aim of this study was to investigate assoc...
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Background South Korea is an aged society that continues to age rapidly. Therefore, the purpose of this study was to investigate the association between changes in lifestyle and cognitive functions in the South Korean elderly using a nationally representative survey. Methods We analyzed data from the Korean Longitudinal Study of Aging (KLoSA) 2006...
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The number of cancer survivors is increasing as a consequence of improved therapeutic options. Many families are suffering from the resultant financial burden. Our study aims to determine the total medical cost for 5 years after the initial diagnosis of childhood cancers. A customized dataset from the Korean National Health Insurance Claims Databas...
Preprint
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Background: In the past decade, the Korean smoking rate has only decreased by 3%, despite several smoking control policies. There is a need for such policies to take smokers’ psychological characteristics into account. Depression is a well-known contributor to failed smoking cessation. This study aimed to examine the effect of smokers’ depression s...
Article
Background Alcohol use among adults with mild to severe disability is an under researched topic in the literature. Few studies have attempted to assess the impact of alcohol misuse, abuse, and chronic alcoholism among this target group. Thus, we investigated the association between chronic alcoholism and mortality among disabled individuals in Sout...
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The incidence of depression among adolescents has gradually increased, leading to adult psychological outcomes and suicide. Although the rate of secondhand smoke exposure (SHSE) has recently decreased, SHSE remains high in children. We aimed to determine the association between depressive symptoms in adolescents and the locations of SHSE using an e...