Item-Level Psychometrics of the Meaningful Activity Participation Assessment (MAPA) Scale.

This study investigates the psychometric properties of the Meaningful Activity Participation Assessment-Meaning (MAPA-M) scale using the Rasch measurement model. For the psychometric properties of MAPA-M, principal component analysis, Rasch analysis, and differential item functioning analysis were conducted. Participants in this study were 480 older adults from the USC Well Elderly 2 study, recruited from 21 locations in the Los Angeles metropolitan area. There were eight items with DIF, but they were accepted because they assumed unidimensionality and showed good person invariance. The 25 items assuming unidimensionality of MAPA-M had values between 0.6 and 1.4 in infit and Outfit MnSq, and all ZSTD values were less than 2.0. The 25 items demonstrated a conceptual item-difficulty hierarchy. The person strata value was 2.68, which is equivalent to a reliability index value of .76. The findings indicate that the revised scale can accurately and reliably measure meaningful activities by older adults.

Effect of Physical Activity on Association between COVID-19 and Personal Life in Community-Dwelling Older Adults.

Our study investigated whether changes in physical activity due to COVID-19 mediate the association between quarantine or hospitalization due to COVID-19 and COVID-19 life impact score. A total of 154 participants (0.23%) were quarantined or hospitalized due to COVID-19. There were mediating effects of changes in physical activity due to COVID-19 (ß = -1.63, 95% confidence interval = -0.77 to -2.42). This study suggests that measures to minimize lifestyle changes during the pandemic are required to reduce negative consequences.

The Role of Physical Activity and Depression on Quality of Life in Community-Dwelling Older Adults: Using Propensity Score Matching Approaches.

This study examined the association between achieving the recommended physical activity level and quality of life after controlling for depression. Health information from adults aged 65 years and older, who had participated in the seventh 2018 Korea National Health and Nutrition Examination Survey, was used. Five covariate adjustment models were used to derive robust estimates of the association between physical activity practice levels, depression, and older adults' quality of life. A total of 1,336 older adults was extracted from the seventh 2018 Korea National Health and Nutrition Examination Survey, and 31% of the older adults achieved the recommended physical activity level, whereas 69% did not. We found that the achievement of physical activity practice levels is significantly associated with the quality of life of the older adults (ß = 0.024-0.031, all p < .05). Our results could be used for advocating for welfare policy changes that promote physical activity to prepare for the upcoming super-aging society.

Association between the length of stay in rehabilitation and mortality among the adults with Parkinson's disease: 2009-2019 Korean National Health Insurance Service Databases.

Background: Rehabilitation is recognized as an effective means of alleviating the symptoms of Parkinson's disease (PD) and improving the physical and cognitive functions of patients with PD. However, research often focuses on short-term outcomes such as functioning and quality of life. This study investigated the association between the length of stay in rehabilitation and mortality among patients with PD. Methods: Using the Korean National Health Insurance Service database, we identified 636 participants diagnosed with PD who received rehabilitation. The main outcome was all-cause mortality. We used a Cox proportional hazards regression model to examine the relationship between length of stay in rehabilitation and mortality among patients with PD. Results: The final sample comprised 374 females (58.81%) and 262 males (41.19%). A survival analysis revealed a significant association between the length of stay in rehabilitation and mortality, with a decrease in mortality of 16.1% in patients with PD who received one year of rehabilitation (hazard ratio = 0.839, 95% confidence interval = 0.788-0.895). Conclusion: Our findings underscore the potential benefits of timely implementation of rehabilitative interventions in patients with PD and the need for comprehensive and long-term rehabilitation strategies. It also highlights the necessity of such services for patients with PD and the importance of developing patient-centered rehabilitation guidelines.

Prevalence of Dysphonia and Dysphagia Among Adults in the United States in 2012 and 2022.

PURPOSE: The purpose of this study was to compare the prevalence of dysphonia and dysphagia among adults in the United States between 2012 and 2022. METHOD: A retrospective and cross-sectional design with national surveys was used. The 2012 and 2022 National Health Interview Surveys were utilized to estimate the number of adults reporting dysphonia and dysphagia in the past 12 months. Multivariate logistic regression models were used to examine associations between the survey year (2022 vs. 2012) and the prevalence rate of dysphonia and dysphagia while accounting for demographics and clinical characteristics. RESULTS: The population-estimated mean age was 46.63 years in 2012, which increased to 48.12 years in 2022. In 2012, adults reporting dysphonia and dysphagia were 17.89 million (7.62%) and 9.44 million (4.02%), respectively. In 2022, these estimates increased to 29.92 million adults (11.71%) and 15.10 million adults (5.91%), respectively. Adults in 2022 had significantly higher odds for reporting dysphonia (odds ratio [OR] = 1.602, 95% confidence intervals [CIs] [1.486, 1.726], p < .0001) and dysphagia (OR = 1.461, 95% CI [1.328, 1.606], p < .0001) in the past 12 months compared to adults in 2012. CONCLUSIONS: The population-estimates indicated that in 2022, dysphonia affected one in 8.5 adults and dysphagia affected one in 17 adults. The increase in prevalence of these disorders should serve as a call-to-action to improve access to care and research for voice and swallowing disorders.

The association between self-rated health, number of family members, and cognitive function in community-dwelling older adults: Mediating role of depression.

With the increasing number of older adults, research on cognitive function has expanded. However, studies examining the mediating effect of depression on the association between complex factors and cognitive function in older adults are still insufficient. Additionally, there is a lack of studies that have investigated these relationships by integrating multiple factors related to the cognitive function of older adults. Therefore, our study investigated the association between the number of family members, self-rated health, depression, and cognitive function in community-dwelling older adults and highlighted the mediating role of depression in these relationships. We used data from 218 older adults aged over 65 collected in a previous study. The independent variables were the number of family members and self-rated health, and the dependent variable was cognitive function measured by the cognitive impairment screening test (CIST). The mediation variable was depression measured by the Patient Health Questionnaire-9 (PHQ-9). Structural equation modeling was used to examine the association between the independent, dependent, and mediation variable. The mean ages of the participants were 81.71 (standard deviation [SD] = 6.00) years, with 198 females (90.83%) and 20 males (9.17%). The structural equation model demonstrated a good model fit (chi-square value = 33.375; degrees of freedom = 24; p-value = 0.0964; RMSEA = 0.042; CFI = 0.970; TLI = 0.956; SRMR = 0.042). Self-rated health and the number of family members were not directly associated with cognitive function; however, depression had significant indirect effects (self-rated health to cognitive function: coefficient = -0.023, p-value = 0.017; number of family members and cognitive function: coefficient = 0.012, p-value = 0.030). Our findings indicated that depression plays a crucial mediating role between self-rated health, number of family members, and cognitive function. The results highlight the need for comprehensive strategies for mental health care to support cognitive health in older adults.

Association Between COVID-19 and Activities of Daily Living in Older Adults.

Older adults gradually decrease their independence with activities of daily living (ADL) due to aging. The coronavirus disease-19 (COVID-19), the recent pandemic, can accelerate the decline in functions, such as ADL. This study aimed to examine whether there is an association between positive COVID-19 results and decreased independence with ADL in older adults. Data for a total of 3,118 older adults were extracted from the 2020 National Health and Aging Trends Study-COVID-19. A total of 71 (2.29%) participants presented with positive COVID-19 tests. There was a significant association between a positive COVID-19 result and decreased independence with ADL (relative risk [RR] = 1.47, 95% confidence interval [CI] = [1.11, 1.96], p = .0079). The study findings revealed that COVID-19 survivors had a high risk of decreased independence with ADL. These findings indicate that COVID-19 survivors have residual functional deficits and would need comprehensive health care services.

The Mediating Role of Social Participation in Motoric Cognitive Risk and its Relation to Depression and Loneliness in Older Adults.

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. METHODS: We performed a secondary analysis of data from the 2015-2016 National Social Life, Health, and Aging Project. Slow gait speed and cognitive decline were used to assess MCR. Mediation analysis was applied to two models, both of which used MCR as an exposure and social participation as a mediator. The outcomes were depression and loneliness for each model, respectively. RESULTS: Among 1,697 older adults, 196 (11.6%) had MCR. The mediating role of social participation was statistically significant in both models. The indirect effect (ß=0.267, p=0.001) of MCR on depression through social participation comprised 11.97% of the total effect (ß=2.231, p<0.001). The indirect effect (ß=0.098, p=0.001) of MCR on loneliness through social participation was 19.48% of the total effect (ß=0.503, p<0.001). CONCLUSION: Interventions to increase social participation may reduce depression and loneliness of older adults with MCR.

Association between divorce and access to healthcare services among married immigrants: propensity score approaches.

BACKGROUND: While divorce is a social determinant of health among married immigrants in Korea, its association with access to healthcare services is unclear. Given the rapid increase in the number of married immigrants in Korea, research is needed to improve minority groups' access to healthcare services. Here, we examined healthcare service utilization among married immigrants. METHODS: We retrieved 11,778 adults from the 2018 Korea National Multicultural Family Survey. We analyzed whether the sex of divorced immigrants is associated with healthcare access using multivariable logistic regression analysis. Further, we analyzed the association between divorce and access to healthcare services among married immigrants using propensity score matching methods. RESULTS: There were 691 (5.8%) divorced immigrants in the data set. The married male immigrants had no association between divorce status and healthcare access (adjusted odds ratio [OR] = 1.05, 95% confidence interval [CI] = 0.55-2.03, p = 0.8620). Divorced immigrants were less likely to receive healthcare services than married immigrants (adjusted OR = 1.42, 95% CI = 1.07-1.88). CONCLUSION: Our findings revealed that divorce increases the risk of limited access to healthcare services among married immigrants. Policymakers and healthcare providers should be aware of these potential disparities in this vulnerable minority population.

Social, behavioural, and functional characteristics of community-dwelling South Korean adults with moderate and severe cognitive impairment.

OBJECTIVES: This study used the 2016 Korean Longitudinal Study on Aging to investigate the social, behavioural, and functional characteristics of community-dwelling South Korean adults with cognitive impairment. METHODS: Participants were classified as normal, moderate impairment, and severe impairment according to an algorithm that combined the Korean Mini-Mental State Examination score and the number of difficulties in performing instrumental activities of daily living. Selected characteristics included grip strength, depression, participation in exercise and social activities, and living in a rural, urban, or suburban community. RESULTS: Most (72.7%) participants were classified as having normal cognition, 20.1% were classified as moderate impairment, and 7.2% were classified as severe impairment. Regardless of sex, the differences in grip strength across the cognitive status classifications were statistically significant, except for the difference between moderate and severe cognitive impairment in males (p = 0.8477). Greater number of depressive symptoms and living in rural areas were associated with significantly higher odds for severe cognitive impairment. Participants with moderate (OR = 0.51) and severe (OR = 0.33) cognitive impairment were less likely to participate in social activities than those with normal cognition. CONCLUSIONS: The study findings revealed that social, behavioural, and functional characteristics are closely related to the cognitive status of community-dwelling adults in South Korea.

Association Between Social Participation and Cognitive Function in Community-Dwelling Adults.

Social participation is associated with cognitive function; however, their causal relationships have not been reported yet. This study was designed to examine the autoregressive effects and bidirectional causal relationship between social participation and cognitive function. In this secondary longitudinal data analysis, we enrolled 4,834 Korean adults. A cross-lagged panel model with fixed effects was used to examine the causal relationships between social participation and cognitive function. Both participation (unstandardized coefficient = .370, p < .001) and cognitive function (unstandardized coefficient = .151, p < .001) had positive autoregressive effects over time. Participation had a cross-lagged effect on cognitive function (unstandardized coefficient = .061, p < .001). However, the cross-lagged effects of cognitive function on participation were not statistically significant (unstandardized coefficient = .051, p = .312). Various health-care programs that promote social participation and improve cognitive function must be established. Additional studies are required to confirm the causal effects of cognitive function on participation.

Item-level psychometrics of the Ascertain Dementia Eight-Item Informant Questionnaire.

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. The confirmatory factor analysis with a 1-factor model using the robust weighted least squares (WLSMV) estimator indicated a unidimensional measurement structure (χ2 = 41.015, df = 20, p = 0.004; root mean square error of approximation = 0.051; comparative fit index = 0.995; Tucker-Lewis Index = 0.993;). The findings indicated that the AD-8 has no misfitting items and no differential item functioning across sex and gender. The items were evenly distributed in the item difficulty rating (range: -2.30 to 0.98 logits). While there were floor effects, the AD-8 revealed good reliability (Rasch person reliability = 0.67, Cronbach's alpha = 0.89). The Rasch analysis reveals that the AD-8 has excellent psychometric properties that can be used as a screening assessment tool in clinical settings allowing clinicians to measure dementia both quickly and efficiently. To summarize, the AD-8 could be a useful primary screening tool to be used with additional diagnostic testing, if the patient is accompanied by a reliable informant.

Cross-National Comparisons of Cognitive and Physical Health in Older Adults Across China, Japan, and Korea: A Systematic Review.

BACKGROUND: Cross-national studies are an emerging research area in public health. Specifically, cross-national health comparisons are important for understanding the factors driving the success or failure of public health policies. Therefore, this study systematically analyzed studies that compared health status (physical health and cognition) of the older adults using national panel data for three East Asian countries-China, Japan, and Korea. METHODS: Google Scholar and PubMed were used for the literature search. The search strategy targeted papers published between 2005 and 2020, yielding a total of 2690 papers, of which seven were selected for the review. The Center for Evidence-Based Medicine (CEBM) criteria was used to assess study design quality. The risk of bias for non-randomized studies (RoBANS) tool, a quality assessment tool developed in Korea to evaluate non-randomized interventional studies, measured risk of bias. RESULTS: Of the seven included papers, two studies performed cognitive comparisons, four studies performed physical health comparisons, and one study compared both cognition and physical health. The studies selected for this study by CEBM criteria included four prospective cohort studies (Level 2B) and three expert opinions without explicit critical appraisal (Level 5). Risk of bias using the RoBANS tool found a risk of confounding variables in four out of seven papers. Finally, measurement items of cognitive and physical health differed across all three countries' panel surveys. CONCLUSION: These results suggest that in order to compare East Asian health policies according to the aging society, it is necessary to develop consistent cognitive and physical health evaluation tools in the future.