Effects of Future Subjective Expectations on Cognitive Decline and Dementia among Middle-Aged and Older Adults.

This study investigated the impact of subjective expectations of the future (e.g., income, life expectancy, and national policies) on the onset of dementia and mild cognitive impairment by sex and age in middle-aged and older adults. The Korean Longitudinal Study of Aging (KLoSA) data from 2008 to 2020, comprising 4116 people above 45 years, were used. A time-series analysis and multiple panel logistic regression were conducted to highlight subjective expectation trends and their effect on dementia and mild cognitive impairment, respectively. Low subjective expectations of the future negatively affected cognitive impairment (total: odds ratio [OR] = 1.02, 95% confidence interval [CI] = 1.01-1.03) and dementia (total: OR = 1.05, 95% CI = 1.03-1.06), and those of national policies were the biggest risk factors for cognitive impairment (total: OR = 1.17, 95% CI = 1.12-1.22) and dementia (total: OR = 1.10, 95% CI = 1.07-1.13). Individuals about to retire and with low expectations of workability were more likely to develop cognitive impairment (total: OR = 1.03, 95% CI = 1.02-1.06). Subjective expectations of economic downturn also caused cognitive impairment, especially in women (OR = 1.04, 95% CI = 1.01-1.07) and early stage older adults (OR = 1.06, 95% CI = 1.02-1.10). Policymakers must consider the impact of changes in national policies and living environments on cognitive impairment and dementia in older adults.

The effect of public hospital closure on the death of long-term inpatients in Korea.

OBJECTIVES: This study aimed to examine the changes in health outcomes and the patterns of medical institution utilization among patients with long-term stays in public hospitals following the closure of a public medical center. It also sought to present a proposal regarding the role of public hospitals in countries with healthcare systems predominantly driven by private entities, such as Korea. METHODS: To assess the impact of a public healthcare institution closure on health outcomes in a specific region, we utilized nationally representative health insurance claims data. A retrospective cohort study was conducted for this analysis. RESULTS: An analysis of the medical utilization patterns of patients after the closure of Jinju Medical Center showed that 67.4% of the total medical usage was redirected to long-term care hospitals. This figure is notably high in comparison to the 20% utilization rate of nursing hospitals observed among patients from other medical facilities. These results indicate that former patients of Jinju Medical Center may have experienced limitations in accessing necessary medical services beyond nursing care. After accounting for relevant mortality factors, the analysis showed that the mortality rate in closed public hospitals was 2.47 (95% confidence interval, 0.85 to 0.96) times higher than in private hospitals. CONCLUSIONS: The closure of public medical institutions has resulted in unmet healthcare needs, and an observed association was observed with increased mortality rates. It is essential to define the role and objectives of public medical institutions, taking into account the distribution of healthcare resources and the conditions of the population.

Association between a Marine Healing Program and Metabolic Syndrome Components and Mental Health Indicators.

Background and Objectives: Metabolic syndrome is a growing health concern globally, and its prevalence continues to increase. This study investigated whether a marine healing program could improve metabolic syndrome indicators and mental health in adults with a metabolic syndrome and those at risk of developing it. Materials and Methods: This study enrolled 30 participants who were assigned to either the experimental or control groups. The duration of the study was set at 4 weeks. Both groups received metabolic syndrome management education, and the experimental group additionally participated in two marine healing programs. Anthropometric indicators, biochemical indicators, and mental health indicators were collected before and after the intervention. Results: The findings indicate that the experimental group had significantly lower systolic blood pressure, triglycerides, and body weight, as well as higher levels of high-density lipoprotein (HDL-C) and uric acid. Mental health indicators (Hospital Anxiety and Depression Scale and quality of life measures) additionally showed improvement. Pre-post comparisons between the experimental group and the control group showed that the experimental group had significantly decreased by 1.05 kg in body weight, whereas the control group increased by 0.29 kg in body weight. In addition, HDL-C decreased by 0.91 mg/dL in the control group and increased by 3.7 mg/dL in the experimental group. Conclusions: Overall, these results suggest that marine healing programs could improve metabolic syndrome indicators such as body weight and HDL-C better than the control treatment.

Digital healthcare for dementia and cognitive impairment: A scoping review.

BACKGROUND: Cognitive disorders, such as Alzheimer's disease, are a global health problem. Digital healthcare technology is an innovative management tool for delaying the progression of dementia and mild cognitive impairment. Thanks to digital technology, the possibility of safe and effective care for patients at home and in the community is increasing, even in situations that threaten the continuity of care, such as the COVID-19 pandemic. However, it is difficult to select appropriate technology and alternatives due to the lack of comprehensive reviews on the types and characteristics of digital technology for cognitive impairment, including their effects and limitations. OBJECTIVE: This study aims to identify the types of digital healthcare technology for dementia and mild cognitive impairment and comprehensively examine how its outcome measures were constructed in line with each technology's purpose. METHODS: According to the Preferred Reporting Items for Systematic reviews and Meta-Analysis extension for Scoping Reviews guidelines, a literature search was conducted in August 2021 using Medline (Ovid), EMBASE, and Cochrane library. The search terms were constructed based on Population-Concept-Context mnemonic: 'dementia', 'cognitive impairment', and 'cognitive decline'; digital healthcare technology, such as big data, artificial intelligence, virtual reality, robots, applications, and so on; and the outcomes of digital technology, such as accuracy of diagnosis and physical, mental, and social health. After grasping overall research trends, the literature was classified and analysed in terms of the type of service users and technology. RESULTS: In total, 135 articles were selected. Since 2015, an increase in literature has been observed, and various digital healthcare technologies were identified. For people with mild cognitive impairment, technology for predicting and diagnosing the onset of dementia was studied, and for people with dementia, intervention technology to prevent the deterioration of health and induce significant improvement was considered. Regarding caregivers, many studies were conducted on monitoring and daily living assistive technologies that reduce the burden of care. However, problems such as data collection, storage, safety, and the digital divide persisted at different intensities for each technology type. CONCLUSIONS: This study revealed that appropriate technology options and considerations may differ depending on the characteristics of users. It also emphasises the role of humans in designing and managing technology to apply digital healthcare technology more effectively.

Relationship between Precarious Employment and Unmet Dental Care Needs among Korean Workers: A Longitudinal Panel Study.

Background and Objectives: Precarious workers experience certain conditions, such as low income, instability in employment, and lack of social security. Precarious employment has increased barriers to the use of dental care services, resulting in more unmet dental care needs. The aim of this study was to identify unmet dental care needs among precarious workers in Korea's labor market, using data from the Korea Health Panel Survey (2011-2017). Materials and Methods: Based on job and income security criteria, four groups were formed: Group A (individuals with job and income security), Group B (individuals reporting job security with income insecurity), Group C (individuals reporting job insecurity with income security), and Group D (individuals with job and income insecurity). We measured self-reported unmet dental need or the inability to receive necessary dental care owing to the past economic burdens. Panel logistic regression analyses were performed to determine the effect of precarious employment on unmet dental care needs for all participants. Results: Approximately 16% of the respondents reported having unmet dental care needs. Unmet dental care needs owing to economic reasons were higher among male workers in groups C and D than among male workers in Group A. In particular, male workers aged 50 years and above in Group B were 3.36 times more likely to have unmet dental care needs than those in Group A. In Group D, female workers showed a high probability of having dental care needs owing to economic reasons. Moreover, female workers aged 18-49 years witnessed an increase in unmet dental care needs. Conclusions: Korean workers with unstable employment and/or income are at a higher risk of having unmet dental care needs owing to financial factors. The findings suggest an urgent need to implement robust national health insurance policies to improve efforts aimed at reducing unmet dental care needs that potentially decreases the disparity in oral health among precariously employed workers. Furthermore, it is necessary to implement comprehensive labor market policies such as sickness benefits for those in precarious employment.

The Gendered Pathways Through Which Intimate Partner Violence Affects Health: Exploring the Role of Unmet Healthcare Needs.

The aim of this study was to examine the relationships between intimate partner violence (IPV), gender, unmet healthcare needs, and health. Specifically, this study identified how unmet healthcare needs mediate the relationship between IPV and health, and how this mediation is moderated by gender. Using data from the National Longitudinal Study of Adolescent to Adult Health (Add Health) (N = 15,425), we first estimated ordinary least squares regression models to investigate the association between IPV and self-rated health. Then, we used structural equation models to examine how unmet healthcare needs mediate this relationship. Lastly, we conducted a moderated mediation model to investigate whether gender moderates these mediation patterns. The results of this study showed that experiencing IPV was associated with a decrease in self-rated health and an increase in the unmet need for medical care (but not in unmet need for routine health check-ups). Unmet need for medical care explained about one-quarter of the negative association between IPV and self-rated health. A moderated mediation model revealed that indirect effects of IPV on health via unmet medical care needs were more pronounced among victimized women than victimized men. This study filled knowledge gaps about the mechanisms underlying the association between IPV and poor health status. Unmet healthcare needs partially mediated the relationship between IPV victimization and health. This mechanism was more salient for the health of victimized women than victimized men. Interventions designed to improve the health of IPV victims may focus on addressing unmet healthcare needs and could be tailored according to the gender of patients.

Who loses more? Identifying the relationship between hospitalization and income loss: prediction of hospitalization duration and differences of gender and employment status.

BACKGROUND: The major determinants of health and well-being include wider socio-economic and political responses to poverty alleviation. To data, however, South Korea has no related social protection policies to replace income loss or prevent non-preferable health conditions for workers. In particular, there are several differences in social protection policies by gender or occupational groups. This study aimed to investigate how hospitalization affects income loss among workers in South Korea. METHODS: The study sample included 4876 Korean workers who responded to the Korean Welfare Panel Study (KoWePS) for all eight years from 2009 to 2016. We conducted a receiver operating characteristics (ROC) analysis to determine the cut-off point for the length of hospitalization that corresponded to the greatest loss of income. We used panel multi-linear regression to examine the relationship between hospitalization and income loss by gender and employment arrangement. RESULTS: The greatest income loss for women in non-standard employment and self-employed men was observed when the length of hospitalization was seven days or less. When they were hospitalized for more than 14 days, income loss also occurred among men in non-standard employment. In addition, when workers were hospitalized for more than 14 days, the impact of the loss of income was felt into the subsequent year. CONCLUSION: Non-standard and self-employed workers, and even female standard workers, are typically excluded from public insurance coverage in South Korea, and social security is insufficient when they are injured. To protect workers from the vicious circle of the poverty-health trap, national social protections such as sickness benefits are needed.

Unmet dental care needs of homeless adults in South Korea: Findings from a national survey.

This study identifies the key factors underlying the unmet dental care needs of South Korean homeless adults that obstructed their dental service access. We analysed data from 551 Korea Homeless Survey respondents (17 years and older) who reported having an oral disease in the previous 12 months. We conducted multiple logistic regression analyses to examine the factors associated with homeless individuals' unmet dental care needs, using weights to make the data nationally representative. Approximately 43% of the homeless people reported having unmet dental care needs. Housing type (living in the street) was significantly associated with an increased odds ratio of unmet dental care needs. However, when social protection programs (housing benefits and Medical Aid [MA]) were included in the model, the statistical significance of the housing type disappeared. Homeless MA recipients were less likely to have unmet needs than those not covered by MA. On the other hand, homeless people who received housing benefits were more likely to receive dental care than people who do not receive these benefits. Consequently, policy makers should develop social protection programs influencing homeless individuals' access to dental care and ensure the sustainable implementation of integrated community-based dental services for homeless adults.

Suicide among Older Adults with Dementia: Effects of Korea's Long-Term Care Insurance System.

South Korea recently expanded its coverage rate of long-term care insurance (LTCI) by adding a "dementia special grade" in 2014 to improve care service accessibility and extend health life for older adults with dementia. In this study, we propose a multifaceted policy to reduce the suicide risk among older adults with dementia by evaluating the effectiveness of using the long-term care services (LTCS). A sample of 62,282 older adults was selected from the "Older Adults Cohort DB" of the National Health Insurance Service. We conducted Kaplan-Meier and Cox regression to represent the yearly survival curve from 2002 to 2015 according to the individual characteristics. Difference-in-difference estimation was conducted to identify the effect of LTCS on suicide rates by using LTCS before and after 2014. The suicide risk of older adults using LTCS was about 0.256-times lower than those who did not use it (OR = 0.296, 95% CI = 0.183-0.478), whereas it increased after the expansion of the dementia grading (OR = 2.131, 95% CI = 1.061-4.280). To prevent the risk of suicide among older adults with dementia, not only did the mortality rate vary depending on the sex, activities of daily living (ADL), and type of caregiver at the individual level but appropriate national intervention and management, such as improving the accessibility of LTCS, are also needed.

Self-Rated Health Status Based on the Type of Health Insurance: A Socioeconomic Perspective.

To investigate the effects of public and private health insurance on self-rated health (SRH) status within the National Health Insurance (NHI) system based on socioeconomic status in South Korea. The data were obtained from 10 867 respondents of the Korea Health Panel (2008-2011). We used hierarchical panel logistic regression models to assess the SRH status. We also added the interaction terms of socioeconomic status and type of health insurance as moderators. Medical aid (MA) recipients were 2.10 times more likely to have a low SRH status than those who were covered only by the NHI, even though the healthcare utilization was higher. When the interaction terms were included, those not covered by the NHI and had completed elementary school or less were 16.59 times more likely to have a low SRH status than those covered by the NHI and had earned a college degree or higher. Expanding healthcare coverage to reduce the burden of non-payment and unmet use to improve the health status of MA beneficiaries should be considered. Particularly, the vulnerability of less-educated groups should be focused on.

The impact of long-term care service on total lifetime medical expenditure among older adults with dementia.

Along with the rapid increase in older adult population in South Korea, the management of dementia is becoming important. Higher dementia prevalence inevitably leads to an excessive burden on medical expenditure throughout one's life, so the catastrophic health expenditure for dementia should be protected in the aspect of both nation and family. Therefore, this study attempted to estimate the lifetime medical expenditures (LE) of older adults with dementia, and confirmed if the long-term care insurance (LTCI) is effective in reducing their medical expenses. The study analyzed LE of adults, aged over 70 years, using a cohort database and simulated the total LE per capita. In order to compare the differences in LE due to dementia, propensity score matching (PSM) was performed. As of 2015, the total LE per capita for older adults with dementia and without dementia was estimated to be 76,973 thousand won ($65,427) and 31,105 thousand won ($26,439). Older adults with dementia had 2.4 times more expenditure than those without dementia. In particular, the LE per capita for hospitalization of dementia patients was 63,945 thousand won ($54,353), which was about 5 times higher than LE per capita for outpatient treatment. In addition, as a result of confirming the political effectiveness of LTCI, the LE for older adults with dementia, who had not used the long-term care service (LTCS), was estimated to be about 85,769 thousand won ($72,904). Conversely, LTCS users were estimated to spend 70,487 thousand won ($59,914), which means that LTCS non-users spent about 22% more on total LE than LTCS users. Non-users spent about half of their LE after the age of 80. Based on these findings, this study confirmed that the LTCI system had the desired effect of reducing the total LE for older adults with dementia.

Obesity and sleep mismatch between weekends and weekdays in the Korean population according to working status.

OBJECTIVES: To investigate whether sleep mismatch between weekends and weekdays is correlated with obesity according to working status and sex in the Korean population. STUDY DESIGN: This study was conducted using data from the Korea National Health and Nutritional Examination Survey (KNHANES) in 2016. A total of 5,684 subjects (2,453 men and 3,231 women) were divided into subgroups according to age, sex and working status. Sleep mismatch was defined as the difference in sleep duration between weekdays and weekends. In this study, multivariable logistic regression analysis was applied to obtain odds ratios (ORs) for obesity in those with sleep mismatch ≥ 90 min when referenced to those with sleep mismatch < 90 min. MAIN OUTCOME MEASURES: In the working group, adjusted ORs for obesity were mostly less than 1, but they were not statistically significant among any age or sex groups. However, for the non-working group, men over 60 years of age with sleep mismatch ≥ 90 min showed significantly increased ORs when referenced to those with sleep mismatch < 90 min in every model; the OR in model 4 was 2.89. Women over 60 years of age with sleep mismatch ≥ 90 min also showed higher ORs but they were not statistically significant. CONCLUSIONS: Men who are not working and over 60 years of age in Korea may be at increased risk of obesity if their sleep mismatch is ≥ 90 min. Therefore, it might be possible to lower the prevalence of obesity in the elderly population by correcting sleep irregularity or through reemployment.

Unmet Healthcare Needs, Catastrophic Health Expenditure, and Health in South Korea's Universal Healthcare System: Progression Towards Improving Equity by NHI Type and Income Level.

This study examined the effects of healthcare inequality on personal health. It aimed to determine how health insurance type and income level influence catastrophic health expenditure and unmet healthcare needs among South Koreans. Unbalanced Korean Health Panel data from 2011 to 2015, including 33,374 adults, were used. A time-trend and panel regression analysis were performed. The first to identify changes in the main variables and, the second, mediating effects of unmet healthcare needs and catastrophic health expenditure on the relationship between health insurance type, income level, and health status. The independent variables were: high-, middle-, low-income employee insured, high-, middle-, low-income self-employed insured, and medical aid. The dependent variable was health status, and the mediators were unmet needs and catastrophic health expenditure. The medical aid beneficiaries and low-income self-employed insured groups demonstrated a higher probability of reporting poor health status than the high-income, insured group (15.6%, 2.2%, and 2.3%, respectively). Participants who experienced unmet healthcare needs or catastrophic health expenditure were 10.7% and 5.6% higher probability of reporting poor health, respectively (Sobel test: p < 0.001). National policy reforms could improve healthcare equality by integrating insurance premiums based on income among private-sector employees and self-employed individuals within the health insurance network.

Unmet Dental Care Needs among Korean National Health Insurance Beneficiaries Based on Income Inequalities: Results from Five Waves of a Population-Based Panel Study.

This study investigates whether self-employed beneficiaries experience greater difficulties in accessing dental care than insured employees based on their income level. This analysis uses 2011-2015 data from the Korea Health Panel, a population-based and nationally representative sample, covering 7083 participants aged 18 years and older. We measured barriers to dental access based on unmet needs or the inability to receive necessary dental care owing to the past year's economic burdens. The type of health insurance and household income are considered independent variables. We applied multiple panel logistic regressions and two-panel logistic regression models with a fixed-effects approach to analyze the data. Self-employed beneficiaries were 1.16 times (95% confidence interval (CI) = 1.08-1.24) more likely to experience unmet dental needs than were insured employees. Insured employees and self-employed beneficiaries belonging to the lowest income bracket were 1.76 times (95% CI = 1.53-2.03) and 2.33 times (95% CI = 1.89-2.87) more likely to have unmet needs than those in the highest income bracket. Self-employed beneficiaries were 1.31 times (95% CI = 1.21-1.43) more likely to experience unmet dental needs caused by economic burdens than are insured employees. Insured employees of the lowest income quintile were 4.15 times (95% CI = 3.41-5.05) more likely to experience unmet needs caused by economic burdens, while the odds ratio for self-employed beneficiaries was 5.47 (95% CI = 4.05-7.39). Our findings indicate gaps in unmet dental needs between self-employed beneficiaries and insured employees. The government should adopt strategies to reduce unmet needs among marginalized groups and redefine the role of national health insurance.

Estimating Lifetime Dental Care Expenditure in South Korea: An Abridged Life Table Approach.

The aim of this study was to measure the magnitude and distribution of a Korean's lifetime dental expenses depending on age and sex, by constructing a hypothetical lifetime and life table of survival. Additionally, we estimated the difference in life expectancy between men and women and its impact on dental expenses. We used the 2015 Korea Health Panel Survey to calculate the total dental expenditure, including expenses paid directly by patients and those paid by insurers. We generated survival profiles to simulate dental expenses during a typical lifetime (from birth to age 95) using the abridged life table (five-year intervals for age groups) in 2015 from the South Korean Statistical Information Service. We independently calculated the remaining dental expenses for survivors of all ages. The results showed that an estimate of average lifetime dental expenditure was $31,851 per capita: $31,587 for men and $32,318 for women. Nearly 33% of the average per capita lifetime dental expenditure was attributable to the longer life expectancy of women, with no statistically significant difference in lifetime dental expenditure between men and women. Many survivors incurred 70% of their lifetime dental expenses before age 65. The results highlighted the need for policymakers to address spending on age-specific dental care owing to extended life expectancy, given the disproportionate share of healthcare resources supporting the elderly.

Has the long-term care insurance resolved disparities in mortality for older Koreans? examination of service type and income level.

The long-term care insurance (LTCI) has been implemented to help the government take responsibility for social prevention and protection measures to maintain and improve older adults' health and well-being since 2008. This study aimed to evaluate the effects of LTCI on mortality of elders in South Korea. The data used from the national representative Elderly Cohort Database for 2009 to 2013. We analyzed longitudinal panel data from 61,235 persons aged 65 years and older. We generated Kaplan-Meier survival curves and Cox proportional hazard models by use and type of long-term care services (LTCSs) (e.g., non-user, facility, and in-home benefits) and income level. The covariate-adjusted approximate mortality rates by LTCSs type for facility and in-home benefits group compared to non-LTCS users were 0.761 and 0.803, respectively. The approximate mortality rates were higher in the middle low- (Hazard Ratio [HR] = 1.131, p < .001), low- (HR = 1.125, p < .001), and middle- (HR = 1.122, p < .001) than the high income group. In particular, the disparities in mortality by income gap in in-home care users of LTCS was greater than that of facility care users in Korea. Consequently, these findings point to the need for program improvements to the quality and quantity of the in-home LTCSs for elderly Koreans. Ensuring a "continuum of care" through education for service providers and stronger relationships with the recipients' families could improve overall quality. There is a particular need to devote more attention to the needs of low-income elderly who currently lack sufficient the health coverage.

The Influence of Exposure to Smoking in Movies on Cigarette Cravings among Adolescents: A Contextual Quasi-Experimental Model.

This study explored the socio-contextual characteristics of adolescents that led them to have increased cigarette cravings when exposed to smoking scenes in films. We analyzed online survey data collected from a representative sample of 955 Korean adolescents. Our dependent variable was change in cigarette cravings after watching a smoking scene; independent variables included sex, age, school type, allowance, smoking experience, and parental smoking. We used paired t-tests to identify the differences in cigarette cravings modified by individual characteristics, and we performed logistic regression to explore the influences on these changes in cravings. The high school students investigated herein had significantly stronger cigarette cravings after they watched smoking scenes than they did prior to watching these scenes (t = -5.039, p < 0.001). The cravings were significantly higher after watching the clips among non-smokers (t = -4.264, p < 0.001) and participants who had at least one parent who smoked (t = -2.114, p < 0.05); non-smoking adolescents were also more likely to crave cigarettes after they watched smoking scenes than were smokers (odds ratio = 6.90, p < 0.001). Korean adolescents who did not smoke and those who had at least one parent who smoked showed the strongest cigarette cravings after being exposed to smoking in films. Consequently, more effective prevention strategies should be developed that recognize this tendency when regulating smoking scenes in movies or implementing related campaigns among adolescents.

Children's Dental Sealant Use and Caries Prevalence Affected by National Health Insurance Policy Change: Evidence from the Korean National Health and Nutrition Examination Survey (2007-2015).

We evaluated the effect of the National Health Insurance (NHI) policy including dental sealant on changes in the prevalence of sealant and caries, and examined how NHI affected sealant utilization and untreated caries in children from diverse income groups in South Korea. We used a multivariate logistic regression analysis to explore the effects of three stages of dental sealant policy (pre-policy: 2007-2009, first post-policy: 2010-2012, and second post-policy: 2013-2015) on the prevalence of dental sealant and untreated caries. Participant data (N = 8161, aged 6-14 years) were derived from the Korea National Health and Nutrition Examination Survey (2007-2015). We also conducted subgroup analysis to determine the effects of the NHI policy on dental sealant and untreated caries by income level. Implementation of dental insurance coverage was associated with higher likelihood of using dental sealant (odds ratio (OR) = 1.39 (95% confidence interval (CI): 1.18-1.63) for the first period and OR = 1.58 (95% CI: 1.33-1.87) for the second period) and lower odds of having untreated caries (OR = 0.79 (95% CI: 0.64-0.98) for the first period and OR = 0.65 (95% CI: 0.51-0.83) for the second period) after controlling for covariates. Results revealed that there was a greater prevalence of dental sealant and a lower prevalence of untreated caries in both middle- and low-income households compared to high-income households. The higher prevalence of dental sealant and lower untreated caries after the policy implementation. Moreover, we demonstrated children from low-or middle-income households were more associated with increasing dental sealant use and a declining prevalence of caries.