Myong Sun Cho

Problematic smartphone use (PSU) has become a growing public health concern among adolescents, with global prevalence estimates ranging from 10% to 30%. Sleep dissatisfaction has been identified as a potential risk factor for PSU. However, the psychological mechanisms underlying this association remain unclear. This study examined the relationship between sleep satisfaction and PSU among Korean adolescents, and investigated the mediating roles of anxiety and loneliness. Data were collected from 48,829 adolescents who were categorized into three groups: general users (72.1%), potential-risk users (24.8%), and high-risk users (3.1%). Group differences were examined using chi-square tests and one-way analysis of variance (ANOVA). Multivariate logistic regression analyses were conducted to identify the factors associated with PSU risk. Mediation analyses were conducted using a counterfactual framework to estimate the total, natural direct, and natural indirect effects of sleep satisfaction on PSU risk through anxiety and loneliness. Increased PSU risk was significantly associated with being female, high smartphone usage time (≥4 hours/day), and reporting poor perceived health. High-risk users reported markedly longer daily smartphone use (7.01 ± 0.12 hours) and significantly higher anxiety and loneliness scores compared to other groups ( p < .001). Poor sleep satisfaction and insufficient physical activity were also significantly associated with higher PSU risk. Mediation analyses indicated significant natural indirect effects through anxiety and loneliness, with proportions mediated of 30.0% and 15.2%, respectively. Sleep dissatisfaction is significantly associated with problematic smartphone use among adolescents, and this relationship is partly explained by heightened anxiety and loneliness. Interventions aimed at improving sleep satisfaction and addressing emotional vulnerability may be effective strategies for reducing the PSU risk in this population.

Background: Recent economic instability and social isolation have increased mental health vulnerabilities among young adults, highlighting the need to clarify how multiple contextual factors shape their subjective well-being. This study explored the relationship between depressive symptoms and subjective well-being among Korean young adults. It also investigated the mediating effects of housing satisfaction, social capital, occupational hazards, and future achievement readiness on this relationship. Methods: A parallel mediation model was used to analyze the mediating effects of housing satisfaction, social capital, future achievement readiness, and occupational hazards on the relationship between depressive symptoms and subjective well-being. The model examined direct and indirect pathways to determine the extent to which these factors influence subjective well-being in young adults. Results: Depressive symptoms were associated with reduced housing satisfaction, social capital, and future achievement readiness, as well as increased exposure to occupational hazards. All four variable associations between depressive symptoms and subjective well-being, suggesting that multiple structural and psychosocial conditions jointly shape young adults’ subjective well-being. Conclusions: The findings suggest that conventional mental health services alone may be insufficient. A multifaceted approach—including housing welfare policies, social connection support, employment and adjustment programs, and initiatives that enhance future preparedness—may help mitigate the negative effects of depressive symptoms and improve subjective well-being among young adults.

The present study developed and evaluated an integrated disaster nursing education program combining functional training and simulator-based learning to address limitations of traditional, theory-driven approaches. Overall, 49 senior nursing students completed the program using a four-stage repeated-measures design. The findings indicated a substantial enhancement in disaster nursing knowledge over time. However, problem-solving ability, learning self-efficacy, and motivation exhibited improvement only in post hoc comparisons. This contradictory yet fundamental finding suggests that knowledge acquisition occurs more directly, whereas problem-solving and motivational competencies require cumulative practice, feedback, and contextual immersion. Educator reflections and student debriefings further underscored the significance of teamwork, communication, and scenario relevance in facilitating learning transfer. Despite its limitations, including a single-site, female-dominated sample, reliance on self-reported measures, and a brief follow-up period, this study makes a significant contribution to the field of disaster nursing education by presenting a sustainable and adaptable model. Incorporation of multi-institutional and longitudinal designs, as well as qualitative analyses of learning processes will be crucial in future studies. This will ensure the study’s generalizability and long-term impact.

Background/Objectives: Postpartum depression (PPD) affects maternal well-being and infant development, with the COVID-19 pandemic exacerbating mental health challenges for new mothers. This study examined the prevalence and predictors of PPD among Korean mothers in the early postpartum period. Methods: A nationwide cross-sectional study was conducted in South Korea from 10 September 2021. A two-stage stratified cluster sampling method recruited 3127 mothers who gave birth between January and December 2020. Data collection included the Edinburgh Postnatal Depression Scale (EPDS) and assessments of sociodemographic, pregnancy-related, infant health, and paternal involvement factors. Results: The prevalence of PPD (EPDS score ≥ 13) was 26.5%. Risk factors included a history of depression during pregnancy (OR = 8.65, p < 0.001), multiparity (OR = 1.03, p = 0.012), and frequent infant medical treatments (OR = 1.04, p < 0.001). Protective factors included better maternal health (OR = 0.36, p < 0.001), longer postpartum care (OR = 0.99, p < 0.001), enhanced postpartum education (OR = 0.97, p < 0.001), positive infant health perception (OR = 0.44, p < 0.001), and greater paternal involvement (OR = 0.97, p < 0.001). Conclusions: PPD is influenced by multiple factors, including maternal health, infant well-being, and paternal support. Routine screening and tailored interventions are essential to improve maternal mental health. Policies promoting holistic postpartum care and paternal involvement should be prioritized, especially during global crises like COVID-19.

This study explored the relationship between depressive symptoms and suicidality among community-dwelling adolescents aged 10–18 years, examining whether self-esteem, somatic symptoms, and self-harm mediate this relationship. Utilizing a pre-existing dataset from a nationwide adolescent mental health survey conducted in Korea in 2021, data were collected using several standardized self-administered instruments: the Korean version of Rosenberg’s self-esteem scale, Korean Children’s Somatization Inventory, Korean version of the Self-Harm Inventory, Mental Health Screening for Depressive Disorders, and Mental Health Screening for Suicide Risk. A path model was constructed and validated, followed by path analysis to assess the effects. Data from 6689 adolescents, including 5937 students and 752 out-of-school adolescents, revealed that 18.7% were in the suicidality group, 11.8% experienced depressive symptoms, 57.9% exhibited somatic symptoms, and 27.4% engaged in self-harm. Depressive symptoms had a positive direct effect on suicidality (β = 0.166, p < 0.001, 95% confidence interval = 0.159–0.172). Bootstrapping tests showed a statistically significant indirect effect of self-esteem, somatic symptoms, and self-harm on the relationship between depressive symptoms and suicidality (β = 0.021, 95% confidence interval = 0.013–0.029). Our findings suggest that self-esteem, somatic symptoms, and self-harm mediate the relationship between depressive symptoms and suicidality, and comprehensive mental health management strategies addressing these factors are recommended.

Ever since baby boomers started turning 65 years old in 2020, Korea is set to become a super-aged society by 2025. This makes it the world’s fastest-aging society. Aging in place (AIP) has become a policy direction to prepare for an aging society and improve older adults’ quality of life. It refers to the ability of older adults to remain in their homes and communities as they age, allowing them to reside in their place of preference and access the services they require to promote their quality of life. A cross-sectional study design was employed using data sampled from the 2020 National Survey of Older Koreans. In total, 9930 older adults (aged between 65 and 99 years old) participated. The results confirmed that the intention to pursue AIP is related to personal factors (education, income, house ownership, smoking, exercise, depression), interpersonal and communal factors (unmet healthcare needs, need for home care services, family contact), and policy level factors (basic pension beneficiary, long-term care services) using an ecological model. The findings may promote individual health behaviors and help fill the gap between unmet healthcare needs and community care services that positively influence older adults’ AIP.