Background Social relationships may be the key to successful aging among older adults. However, little is known about the variability of social relationships among community-dwelling older people. This study aimed to describe the patterns of social relationships and examine the differences in sociodemographic characteristics and mental and physical health status among these patterns. Methods We obtained the data from a questionnaire survey in 2017 for older adults aged 65 and above who lived in a suburban area in Japan. The Index of Social Interaction (ISI) was used to evaluate social relationships. The final sample comprised 964 people who were independently mobile and answered at least one item of the ISI. To clarify the patterns of social relationships, latent class analysis was performed with five subscales of ISI treated as indicator variables. Multinomial logistic regression was conducted to examine the factors associated with the patterns of social relationships. Results The patterns of social relationships were classified into three classes: “Active” (73.6%), “Socially isolated” (14.7%), and “Less motivated” (11.7%). Persons who had depressive symptoms were more likely to be allocated to the “Socially isolated” (Odds Ratio [OR] 1.80, 95% Confidence Interval [CI] 1.13–2.86) or the “Less motivated” groups (OR 1.69, 95% CI 1.00–2.85) compared to the “Active” group. In addition, men (OR 1.72, 95% CI 1.07–2.76) and those living alone (OR 3.07, 95% CI 1.43–6.61) were more likely to be allocated to the “Socially isolated” group. Moreover, those who were dependent, according to the instrumental activities and daily living functions, were more likely to be assigned to the “Socially isolated” (OR 2.19, 95% CI 1.21–3.97) or “Less motivated” (OR 6.29, 95% CI 3.47–11.39) groups. Conclusion This study revealed the patterns of social relationships in older adults and suggested that there may be variations of social relationships among community dwellers. The results also indicated the necessity of assessing individual patterns of social relationships and devising strategies for each pattern in public health practice.
Background: There is a difference in the neuronal state of individuals. However, this has not been taken into consideration in most intervention studies. Recent advances in analytical technologies in hematological examination enabled us to evaluate neuronal states in a relatively convenient manner. Objective: Using these advanced technologies, we aimed to investigate whether cognitive intervention effects vary as a function of levels of blood-based biomarkers, such as neurofilament light chain (NfL), since plasma NfL could be a biomarker of neurodegenerative diseases including Alzheimer's disease. Methods: In this study, we employed a group conversation-based intervention methodology named Photo-Integrated Conversation Moderated by Robots (PICMOR), which has been shown to improve verbal fluency in older adults. To examine the possibility of varying effects of this intervention method according to the neuronal state of each individual, we conducted a randomized controlled trial (UMIN Clinical Trials Registry number: UMIN000036599) and investigated how longitudinal changes in cognitive performance, such as verbal fluency, vary with the NfL level measured at the baseline. Results: As the main result, positive intervention effects of PICMOR on verbal fluency were observed in individuals with lower level of NfL, which indicate a relatively intact neuronal state, whereas negative intervention effects were identified in individuals with higher NfL level. Conclusion: Our findings suggest that cognitive intervention effects vary depending on level of Nfl in the plasma. Thus, future intervention studies should take into account the neuronal status of the participants to examine intervention effects.
Background: Social relationships are associated with physical function. However, little scholarly attention has been focused on the effect of changing social factors on physical function.Purpose: This study was designed to examine the effects on physical function of changes in social relationships in adults aged 65 years and older.Methods: This study is part of a longitudinal, prospective cohort study that was conducted on community-dwelling older adults in a suburban area of central Japan. Baseline self-report data were collected in 2011, and a follow-up survey was conducted in 2017. Social relationships were assessed using the Index of Social Interaction, and physical function was evaluated using a subscale of the Kihon Checklist. Chi-square tests, Mann-Whitney U tests, and multiple logistic regression analysis were used to analyze data from 442 older adults who were functionally independent at baseline. Results: After controlling for covariates in 2011, negative changes in social relationships (odds ratio [OR] = 3.20, 95% CI [1.18, 8.69]) were found to be associated with physical function decline. Moreover, 1-point increases in the different social-relationship values between baseline and follow-up were associated with protective effects against functional decline (OR = 0.71, 95% CI [0.63, 0.80]). Furthermore, median trends between baseline and follow-up revealed associations between decreasing (OR = 4.18, 95% CI [1.53, 11.39]) and continuously low (OR = 2.98, 95% CI [1.42, 6.28]) social relationships and physical function decline.Conclusions/Implications for Practice: The findings support a strong association between negative changes in social relationships and physical function decline and highlight the importance of promoting social relationships to delay physical function decline in older adults.
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