Objectives: We mapped trends in studies on dietary behaviors, nutritional status, and nutrition-related education among individuals with developmental disabilities in Korea over the past decade to identify research gaps and inform future research and policy development. Methods: A scoping review was conducted using three major Korean academic databases (RISS, KISS, and DBpia). Studies published between 2015 and September 2025 were identified using combinations of keywords related to developmental disabilities, dietary behavior, nutrition, and health-related interventions. Eligible studies included empirical studies and secondary research (e.g., systematic or scoping reviews) conducted in Korea that focused on dietary behaviors, nutrition, health promotion, or nutrition-related education for individuals with developmental disabilities. Thirty-six studies met our inclusion criteria and were analyzed based on study design, study population, disability type, research topic, and publication period. Results: Observational quantitative, qualitative, intervention-based experimental, and evidence synthesis accounted for 27.8%, 13.9%, 22.2%, and 36.1% of all included studies, respectively. Children and adolescents (27.8%) and adults (25.0%) were the most frequently studied populations, with limited studies focusing on professionals or teachers. Most studies targeted individuals with developmental disabilities as a combined group (61.1%), followed by those specifically targeting autism spectrum disorder. Research topics included dietary behaviors and nutritional status, nutrition-related education and interventions, health promotion, and medical or clinical issues, with many small-scale and shortterm intervention studies. Conclusion Although research on dietary and nutrition-related issues among individuals with developmental disabilities in Korea has expanded in scope and methodology, significant limitations remain. Future research should adopt longitudinal and community-based approaches, incorporate diverse populations, and strengthen policy-oriented nutrition support systems to promote sustainable health and quality of life for individuals with developmental disabilities.

Purpose: This study examined associations between timing of marital dissolution, duration since marital dissolution, and self-rated health among marriage immigrants in South Korea who live in single-person households. Methods: This cross-sectional study employed a secondary analysis of data from the 2021 Korean National Multicultural Family Survey. We performed binary logistic regression analyses to examine the relationships between the variables of interest while controlling for social support, economic well-being, psychological well-being, and sociodemographic characteristics. Data from 407 marriage immigrant single-person households were included in the analyses. Results: Marriage immigrants’ self-rated health fluctuated over time but generally exhibited a downward trend following marital dissolution. After controlling for confounders, marital dissolution after age 50 and longer duration since dissolution (e.g., 3-6 years and 9+ years) were associated with increased odds of poor self-rated health. Unemployment and depressive symptoms significantly increased the odds of poor self-rated health, while higher social support had a protective effect. Conclusion Transitioning to singlehood after marital dissolution may have long-term negative health consequences, particularly for those experiencing this transition later in life. Proactive interventions focusing on social support and health resource acquisition within the initial 3 years of separation may be crucial to mitigate health decline.

Purpose: This study examined associations between timing of marital dissolution, duration since marital dissolution, and self-rated health among marriage immigrants in South Korea who live in single-person households. Methods: This cross-sectional study employed a secondary analysis of data from the 2021 Korean National Multicultural Family Survey. We performed binary logistic regression analyses to examine the relationships between the variables of interest while controlling for social support, economic well-being, psychological well-being, and sociodemographic characteristics. Data from 407 marriage immigrant single-person households were included in the analyses. Results: Marriage immigrants’ self-rated health fluctuated over time but generally exhibited a downward trend following marital dissolution. After controlling for confounders, marital dissolution after age 50 and longer duration since dissolution (e.g., 3-6 years and 9+ years) were associated with increased odds of poor self-rated health. Unemployment and depressive symptoms significantly increased the odds of poor self-rated health, while higher social support had a protective effect. Conclusion Transitioning to singlehood after marital dissolution may have long-term negative health consequences, particularly for those experiencing this transition later in life. Proactive interventions focusing on social support and health resource acquisition within the initial 3 years of separation may be crucial to mitigate health decline.

Purpose: This study examined associations between timing of marital dissolution, duration since marital dissolution, and self-rated health among marriage immigrants in South Korea who live in single-person households. Methods: This cross-sectional study employed a secondary analysis of data from the 2021 Korean National Multicultural Family Survey. We performed binary logistic regression analyses to examine the relationships between the variables of interest while controlling for social support, economic well-being, psychological well-being, and sociodemographic characteristics. Data from 407 marriage immigrant single-person households were included in the analyses. Results: Marriage immigrants’ self-rated health fluctuated over time but generally exhibited a downward trend following marital dissolution. After controlling for confounders, marital dissolution after age 50 and longer duration since dissolution (e.g., 3-6 years and 9+ years) were associated with increased odds of poor self-rated health. Unemployment and depressive symptoms significantly increased the odds of poor self-rated health, while higher social support had a protective effect. Conclusion Transitioning to singlehood after marital dissolution may have long-term negative health consequences, particularly for those experiencing this transition later in life. Proactive interventions focusing on social support and health resource acquisition within the initial 3 years of separation may be crucial to mitigate health decline.

Purpose: This study examined associations between timing of marital dissolution, duration since marital dissolution, and self-rated health among marriage immigrants in South Korea who live in single-person households. Methods: This cross-sectional study employed a secondary analysis of data from the 2021 Korean National Multicultural Family Survey. We performed binary logistic regression analyses to examine the relationships between the variables of interest while controlling for social support, economic well-being, psychological well-being, and sociodemographic characteristics. Data from 407 marriage immigrant single-person households were included in the analyses. Results: Marriage immigrants’ self-rated health fluctuated over time but generally exhibited a downward trend following marital dissolution. After controlling for confounders, marital dissolution after age 50 and longer duration since dissolution (e.g., 3-6 years and 9+ years) were associated with increased odds of poor self-rated health. Unemployment and depressive symptoms significantly increased the odds of poor self-rated health, while higher social support had a protective effect. Conclusion Transitioning to singlehood after marital dissolution may have long-term negative health consequences, particularly for those experiencing this transition later in life. Proactive interventions focusing on social support and health resource acquisition within the initial 3 years of separation may be crucial to mitigate health decline.

Purpose: This study examined associations between timing of marital dissolution, duration since marital dissolution, and self-rated health among marriage immigrants in South Korea who live in single-person households. Methods: This cross-sectional study employed a secondary analysis of data from the 2021 Korean National Multicultural Family Survey. We performed binary logistic regression analyses to examine the relationships between the variables of interest while controlling for social support, economic well-being, psychological well-being, and sociodemographic characteristics. Data from 407 marriage immigrant single-person households were included in the analyses. Results: Marriage immigrants’ self-rated health fluctuated over time but generally exhibited a downward trend following marital dissolution. After controlling for confounders, marital dissolution after age 50 and longer duration since dissolution (e.g., 3-6 years and 9+ years) were associated with increased odds of poor self-rated health. Unemployment and depressive symptoms significantly increased the odds of poor self-rated health, while higher social support had a protective effect. Conclusion Transitioning to singlehood after marital dissolution may have long-term negative health consequences, particularly for those experiencing this transition later in life. Proactive interventions focusing on social support and health resource acquisition within the initial 3 years of separation may be crucial to mitigate health decline.

There are limited data directly comparing humoral and T cell responses to the ChAdOx1 nCoV-19 and BNT162b2 vaccines. We compared Ab and T cell responses after first doses of ChAdOx1 nCoV-19 vs. BNT162b2 vaccines. We enrolled healthcare workers who received ChAdOx1 nCoV-19 or BNT162b2 vaccine in Seoul, Korea. Anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) S1 protein-specific IgG Abs (S1-IgG), neutralizing Abs (NT Abs), and SARS-CoV-2-specific T cell response were evaluated before vaccination and at 1-wk intervals for 3 wks after vaccination. A total of 76 persons, comprising 40 injected with the ChAdOx1 vaccine and 36 injected with the BNT162b2 vaccine, participated in this study. At 3 wks after vaccination, the mean levels (±SD) of S1-IgG and NT Abs in the BNT162b2 participants were significantly higher than in the ChAdOx1 participants (S1-IgG, 14.03±7.20 vs. 6.28±8.87, p<0.0001; NT Ab, 183.1±155.6 vs. 116.6±116.2, p=0.035), respectively. However, the mean values of the T cell responses in the 2 groups were comparable after 2 wks. The humoral immune response after the 1st dose of BNT162b2 developed faster and was stronger than after the 1st dose of ChAdOx1. However, the T cell responses to BNT162b2 and ChAdOx1 were similar.

Correlation between vaccine reactogenicity and immunogenicity against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is unclear. Thus, we investigated to determine whether the reactogenicity after coronavirus disease 2019 vaccination is associated with antibody (Ab) titers and T cell responses. This study was prospective cohort study done with 131 healthcare workers at tertiary center in Seoul, South Korea. The degrees of the local reactions after the 1st and 2nd doses of ChAdOx1 nCov-19 (ChAdOx1) vaccination were significantly associated with the S1-specific IgG Ab titers (p=0.003 and 0.01, respectively) and neutralizing Ab (p=0.04 and 0.10, respectively) in age- and sex-adjusted multivariate analysis, whereas those after the BNT162b2 vaccination did not show significant associations. T cell responses did not show significant associations with the degree of reactogenicity after the ChAdOx1 vaccination or the BNT162b2 vaccination. Thus, high degree of local reactogenicity after the ChAdOx1 vaccine may be used as an indicator of strong humoral immune responses against SARS-CoV-2.