[Relationships between participation in community activities and psychosocial and physical health of community-dwelling elderly].

OBJECTIVE: The aim of this study was to clarify relationships between participation in community activities and psychosocial and physical health of community-dwelling elderly. METHODS: The participants of the present study were 413 people selected on the basis of a random 1/3 extraction of people aged 65 or older and living in a rural community in Miyagi prefecture. The baseline survey was conducted in February 2008. One year later, we conducted a follow-up survey to clarify how participation in community activities influenced the elderly. Finally, we analyzed data for 218 people, focusing on influences on psychosocial and physical health using the logistic regression model. The state of community activity was treated as a dependent variable, and mental and physical health indicators were assessed as the independent variables. RESULTS: Of the elderly sample, 63 persons were found to be frequent participants in community activities, 60 were infrequent participants, and 95 did not participate. The frequently participating individuals displayed significantly better results for declines in depression (OR = 0.34, 95% CI: 0.13-0.89), and social participation (OR = 0.12, 95% CI: 0.05-0.29), as well as the TMIG index of competence (OR = 0.26, 95% CI: 0.08-0.78) as compared with those who did not participate. CONCLUSION: These results suggest that community activities prevent deterioration of mental health, improve social health, and maintain higher-level functional capacity among community-dwelling elderly individuals.

[Relationships between volunteerism and social-physical health and QOL with community-dwelling elderly participating in a long-term care prevention programme].

OBJECTIVE: The aim of this study was to clarify the influence of volunteerism as part of a long-term care prevention program on social and physical health indicators and QOL, as compared with non-participation among elderly people. METHODS: The baseline survey was conducted in 2003 among elderly people (age, 70-84 years) living in a rural community in Miyagi Prefecture. We recruited elderly volunteer leaders for long-term care prevention from among the 1,503 elderly people participating in the baseline survey. Of these, 77 individuals were registered as volunteer leaders. One year later, we conducted a follow-up survey to clarify the influence of volunteerism. Finally, we analyzed data for 69 volunteer leaders and 1,207 non-leaders, focusing on influences of volunteerism on social and physical health and QOL using a logistic regression model. State of volunteer activity was treated as a dependent variable, and social and physical health indicators and QOL indices as independent variables. RESULTS: Non-participating individuals had significant declines in Intellectual Activity (OR: 4.51, 95% CI: 1.60-12.74), Social Role (OR: 2.85, 95%CI: 1.11-7.21), Self-efficacy for ADL (OR: 4.58, 95%CI: 1.11-18.88), Satisfaction with Economic State (OR: 2.83, 95%CI: 1.11-7.21), and Contact with Neighbors (OR: 3.62, 95%CI: 1.29-10.16), as compared with volunteers. CONCLUSION: These results suggest that volunteerism prevents lowering of higher-level functional capacity and social networking among community-dwelling elderly individuals.

[Characteristics of elderly leaders volunteering to participate in a fall prevention programme].

OBJECTIVES: This study was conducted to assess characteristics of elderly leaders volunteering to participate in a fall prevention programme. METHODS: We surveyed 1,503 individuals (75 elderly leaders volunteering to participate in a fall prevention programme and 1,428 non-leader elderly) among the elderly population living in a rural community, Miyagi Prefecture. Subjects were aged 70-84 years. The questionnaire covered socio-demographic factors, as well as physical, psychology and social variables. To analyze the characteristics of the elderly leaders volunteering to participate in this programme, the relationships of socio-demographic, physical, psychology and social factors to whether the elderly were leaders in the programme were analyzed using logistic regression. RESULT: As a result of multiple logistic regression analysis, the characteristics of elderly leaders volunteering to participate in the fall prevention programme were as follows; 1) being male (OR = 0.25, 95%CI 0.14-0.44); 2) young age (OR=0.43, 95%CI 0.25-0.73); 3) having a high intellectual activity (OR = 2.72, 95%CI 1.65-4.48); 4) being well satisfied with their health (OR = 1.45, 95%CI 1.02-2.07), and 5) having a high IKIGAI (OR = 1.06, 95%CI 1.01-1.13). CONCLUSION: Only elderly individuals capable of high-level intellectual activities can fill the roles of elderly volunteer group leaders discussed in this study.

Local chain mobility of gellan in aqueous systems studied by fluorescence depolarization.

The local chain mobility of a gellan, an electrolyte polysaccharide, in aqueous systems was examined with respect to the effect of the temperature, the concentration of gellan (c(G)), and the concentration of added salt (c(S)). The relaxation time of local motion was estimated for fluorescein isothiocyanate (FITC)-labeled-gellan by the fluorescence depolarization technique, and the chain mobility was discussed. The relaxation time increased with decreasing temperature, in particular when accompanying the coil-helix transition due to the great difference in chain mobility between the coil and the helical conformations. The effect of c(G) was observed for gellan solutions even below the critical concentration of chain entanglement (2 wt.-%) for well-expanded nonelectrolyte polymers with size similar to that of the gellan. This suggests that the actual excluded volume of gellan is larger than that of nonelectrolyte polymers due to the electrostatic repulsion between segments. The relaxation time for 0.2 wt.-% systems of gellan in coil conformation is independent of c(S), whereas a c(S) dependence of the relaxation time is clearly observed for 0.5 wt.-% systems. The degree of expansion of the gellan chain is independent of the shielding effect of cations on the electrostatic repulsion between gellan segments due to the stiffness of gellan chain. On the other hand, the c(G) as well as the c(S) dependence of the chain mobility is clearly observed for gellan in the helical conformation, examined over the concentration range, probably due to the partial aggregation of helices induced by the attractive interaction between gellan segments.

Effect of exercise, aging and functional capacity on acute secretory immunoglobulin A response in elderly people over 75 years of age.

BACKGROUND: Age-associated decline in immune function and regulation, referred to as immunosenescence, brings about an increased incidence of infectious diseases in the aged; however, there are few data on the effect of aging and exercise on mucosal immune function in elderly people. Moreover, there is no evidence on whether the change in functional capacity affects mucosal immunity in elderly people. Therefore, the aim of the present study was to examine the effects of exercise, aging and functional capacity on mucosal immune function in elderly people over 75 years of age. METHODS: The subjects were 92 community-dwelling elderly women aged over 75 years who lived in a rural community in Miyagi Prefecture. The subjects periodically performed approximately 20 min of low intensity exercise. Saliva samples were collected before and after exercise, and saliva flow (SF), secretory immunoglobulin A (SIgA) concentration (SIgA-C) and SIgA secretion rate (SIgA-SR) were determined. The Tokyo Metropolitan Institute of Gerontology Index of Competence (TMIG-IC) was used to measure functional capacity. RESULTS: In comparison with before exercise, SF, SIgA-C and SIgA-SR were significantly increased after exercise in elderly subjects. In addition, when low and high value groups of resting SIgA levels were compared, acute SIgA responses were observed only in the low value group; however, there was no significant effect of aging and decline in functional capacity on exercise-induced SIgA response. CONCLUSION: These results suggest that resting SIgA levels influence the mucosal immune function response to exercise in elderly people over 75 years of age.