The Purpose of Internet Use and Face-To-Face Communication With Friends and Acquaintances Among Older Adults: A JAGES Longitudinal Study

Internet use influences social interactions in society. However, there is no consensus on whether and what kind of Internet use increases face-to-face communication (FFC). This study investigated the mode of Internet use that increases FFC among older adults after three years. Participants were 8734 adults aged 65 or older who responded to the Japan Gerontological Evaluation Study (JAGES) surveys in 2016 and 2019. The exposures were the purposes of Internet use in 2016. The outcome was the frequency of FFC with friends or acquaintances in 2019. The confounders included 13 demographic, socioeconomic, and psychological variables. We performed modified Poisson regression analyses and found that Internet use for communication in 2016 increased FFC in 2019, especially for low-frequency FFC in 2016. Internet-based non-FFC may help promote FFC and prevent social isolation among older adults who are less likely to interact with others.

Comparison of the Incidence of Functional Disability Correlated With Social Participation Among Older Adults in Japan

BACKGROUND

Japan, which has the world's longest life expectancy, has been reporting rejuvenation of physical function among its older adult population. However, evidence for the incidence of functional disability is limited. This study aimed to investigate the comparison in the incidence of functional disability.

DESIGN

We used data from the Japan Gerontological Evaluation Study.

SETTING AND PARTICIPANTS

The participants were 2 nonoverlapping cohorts of 22,522 (2010-2013 cohort) and 26,284 (2016-2019 cohort) individuals aged 65 years and older from 5 municipalities who were followed for 3 years each.

METHODS

The incidence rates of functional disability during the 3-year follow-up period were compared between cohorts. To examine the incident differences between the cohorts, we adjusted for social participation and 9 additional factors that would be expected to improve with social participation using the Weibull survival models adjusting for municipalities as random effects. The analysis was stratified by age groups (65-74 years old and ≥75).

RESULTS

The incidence rate of functional disability per 10,000 person-years decreased from 68.6 (2010-2013 cohort) to 51.4 (2016-2019 cohort) in the 65 to 74 years old group and 380.0 (2010-2013 cohort) to 282.6 (2016-2019 cohort) in the ≥75 group; the hazard ratios (95% CIs) were 0.75 (0.64-0.89) and 0.73 (0.67-0.80), respectively. However, these significant decreases disappeared with adjustments for social participation and additional factors.

CONCLUSIONS AND IMPLICATIONS

The incidence of functional disability decreased in a recent cohort, which may be explained by social participation and possibly related factors. Promoting social participation could contribute to a decreasing incidence of functional disability among older adults.

Socioeconomic status and incident depressive symptoms among older adults: A 3-year longitudinal study from the Japan Gerontological Evaluation Study

OBJECTIVES

The association between socioeconomic status (SES) and the onset of depressive symptoms has attracted considerable attention. However, few studies have simultaneously examined the association of multiple SES indicators, including "assets," with the onset of depressive symptoms. Therefore, this study examined the association of four SES indicators in old age ('years of education' 'equivalent income,' 'equivalent assets,' and 'the longest-held job') with new-onset depressive symptoms in a large Japanese dataset.

METHODS

This longitudinal study used panel data of cognitively and physically independent older adults from the Japan Gerontological Evaluation Study (JAGES) conducted in 2013 and 2016. Multivariate logistic regression analysis was conducted to examine the association of each SES indicator with new-onset depressive symptoms, and odds ratios and 95% confidence intervals (CIs) were calculated.

RESULTS

We analyzed the data of 40,257 older adults, with a mean age (± standard deviation) of 72.9 (±5.5) years. In the follow-up survey, 4292 older adults had new-onset depression symptoms (10.7%). 39.3% had 10-12 years of education. 36.9% had an equivalent income of up to JPY 1.99 million. 24.4% had equivalent assets of JPY 4-17.99 million. Most had a clerical job for the long time. Furthermore, fewer years of education (males: OR = 1.42, 95% CI = 1.22-1.64, p-value <0.001/females: 1.26, [1.09-1.47], p = 0.002), lower income (males: 1.64, [1.34-2.01], p < 0.001/females: 1.82, [1.49-2.22], p < 0.001), and fewer assets (males: 1.40, [1.16-1.68], p < 0.001/females: 1.21, [1.02-1.42], p = 0.025) resulted in higher odds of having new-onset depressive symptoms, even when other SES indicators were entered simultaneously.

CONCLUSIONS

All four SES indicators have an independent association with the development of new-onset depressive symptoms among older adults, reflecting different aspects of SES. The association between the "longest-held job" and new-onset depressive symptoms can be largely explained by other SES indicators. A multifaceted and lifetime approach is required to prevent the onset of depressive symptoms in old age.

Results of thyroidectomies according to general surgeons and otolaryngologist and cervico faciale surgeons at the general Hospital of Reference of Niamey, what differences in the protocols of management?

OBJECTIVE

To evaluate the surgical management of thyroid pathologies at the Reference General Hospital.

METHODS

This was a retro-prospective study over 4 years 6 months carried out in the departments of General and Digestive Surgery (GDS) and Otorhinolaryngology and Cervico Facial Surgery (ORL/FCS). It involved 182 patients who underwent thyroid surgery.

RESULTS

A frequency of thyroidectomy of 9.46% was found. Females predominated with a sex ratio of 0.1. The average age of patients was 42.85 years, a standard deviation 12.80. 84.06% of patients had consulted for anterior cervical mass. EU-TIRADS score 3 represented 7,14% of cases. Heteromultinodular goiter was the main indication for thyroid surgery (59.34%). Total thyroidectomy was the most commonly performed gesture in general surgery in 88,23% (n = 105), in Otorhinolaryngology, it was in the same proportion as lobo-isthmectomy at 47.61% (n = 30). The first route was video-assisted thyroidectomy 2.2% (n = 4). The recurrent laryngeal nerve was dissected and seen in 159 cases (87.36%) and parathyroid glands were also seen and preserved in 58.24% of cases (n = 106). In immediate postoperative surgery, the main complications were unilateral recurrent paralysis with dysphonia in 3.3% (n = 6) and compressive hematoma in 2.2% (n = 4). No deaths had been recorded.

CONCLUSION

Total thyroidectomy was the most performed procedure in department of General and Digestive Surgery. Routine oral calcium and vitamin D supplementation in the general surgery ward, reduces the occurrence of hypocalcemia after total thyroidectomy and allows a safe and early exit. Standardizing protocols will further reduce complications.

Does eating with others promote happiness among older adults living alone? A 3-year longitudinal study of the Japan gerontological evaluation study

OBJECTIVE

Living a happy life is an essential issue for old adults. However, how eating with others contributes to happiness and whether this association is different by living arrangements or not is unknown. The current study examined the relationship between the frequency of eating with others and happiness among older adults according to their living arrangements using 3-year longitudinal data.

METHODS

The analyzed sample comprised 18,727 people (10,920 males and 7807 females) with low happiness (0-7 points on score of 0-10 points) from Japan Gerontological Evaluation Study (JAGES) in 2016. Our exposure was the frequency of eating with others: rarely, a few times a year, a few times a month, and a few times a week or more. We performed Modified Poisson Regression to examine the association between the frequency of eating with others and high happiness (8-10 points) in 2019 stratified by living arrangement (living alone/with others).

RESULTS

A total of 4352 (23.2%) people showed high happiness in 2019. After adjusting for age, sex, marital status, education, household income, social participation, illnesses under treatment, and depressive symptoms in 2016, the cumulative incidence ratio (CIR) for high happiness in 2019 among people living alone was more significant, that is, 1.28 (95% confidence intervals: 0.88-1.87), 1.50 (1.05-2.14), and 1.82 (1.26-2.63), than 1.28 (1.11-1.48), 1.30 (1.12-1.50), and 1.33 (1.16-1.52) among people living with others for those who ate with others a few times a year, a few times a month, and a few times a week or more compared to those who rarely ate with others, respectively. The interaction between the frequency of eating with others and living arrangements was statistically significant. The trend test showed that higher frequency of eating with others was significantly associated with high happiness.

CONCLUSIONS

Eating with others was associated with improved happiness among older adults, with such an association being stronger among people living alone.

[Association between use of the "health-supportive" roadside station and self-rated health: A three-wave longitudinal study]

Objective　Mutsuzawa town, Chiba Prefecture, relocated a "health-supportive" roadside station in 2019. The underlying hypothesis is that older people who use the roadside station will have better self-rated health than those who do not use it. We aimed to verify whether roadside station use was associated with a decrease in poor self-rated health.Method　This was a longitudinal study that compared and evaluated the roadside station use and non-use groups using three-wave panel data before and after relocation of the roadside station in September 2019. To obtain three-wave panel data, self-administered questionnaires were mailed three times: in July 2018 (FY 2018) before the station was relocated and in November 2020 (FY 2020) and January 2022 (FY 2021) after the relocation in 2019. The dependent variable was poor self-rated health in FY 2021, and the independent variable was use of the roadside station as of FY 2020. Covariates included basic characteristics from FY 2018, as well as going out, social participation, and interacting on social networks in FY 2018 and FY 2020. A multivariate analysis was conducted using multiple imputation to complete missing values for the Crude model, which included the basic attributes of FY 2018 (Model 1); going out, social participation, and interacting on social networks in FY 2018 (Model 2); and going out, social participation, and interacting on social networks in FY 2020 (Model 3). The cumulative incidence rate ratio (CIRR), 95% confidence intervals, and P-values were calculated using a modified Poisson regression analysis for each model.Results　Of the 576 participants, 344 (59.8%) were roadside station users. The multivariate analysis adjusted for basic attributes revealed that the number of people with poor self-rated health in the user group was significantly lower than that in the non-user group, with a CIRR of 0.67 (95% confidence interval: 0.45-0.99, P=0.043). However, the adjusted model showed a CIRR of 0.71 (95% confidence interval: 0.48-1.06, P=0.096) for going out, social participation, and interacting on social networks in FY2020 after the roadside station opened.Conclusion　Findings of this study revealed that, after adjusting for confounding factors prior to relocation of the roadside station, the number of people with poor self-rated health decreased in the user group. Thus, such commercial facilities as roadside stations, which give users an opportunity to go out and meet people, can provide a "naturally healthy" environment.

[Association between social participation and frailty among older adults: A longitudinal study from Japan Gerontological Evaluation Study]

Objective　In Japan, measures to prevent frailty among older adults have been implemented. Promotion of social participation is a key measure, but few longitudinal studies have examined the relationship between the types and number of social participation and frailty onset. In this study, we aimed to clarify the relationship between the types and number of social participation and frailty onset using longitudinal data from a large sample of older adults in municipalities in Japan.Methods　We used the 2016 and 2019 panel survey data from the Japan Gerontological Evaluation Study (JAGES). The analysis included 59,545 individuals from 28 municipalities who responded to the JAGES survey in both 2016 (at baseline) and 2019 (at follow-up). We excluded individuals who were dependent on activities of daily living at baseline and non-responders, and those who were frail or with no information about frailty. The dependent variable was frailty onset (≥8 out of 25 points on the basic checklist) at follow-up, and the independent variables were the types and number of types of social participation at baseline. We included 11 variables as potential confounders. We used multiple imputations to complete the missing values and used modified Poisson regression to examine the association between social participation and risk of frailty onset.Results　Of the 59,545 participants, 6,431 (10.8%) were frail onset at follow-up. After multiple imputations (minimum 64,212, maximum 64,287), the risk of frailty onset at follow-up was lower for eight types of social participation, excluding senior citizens' clubs, (nursing care [risk ratio; 0.91], paid work [0.90], volunteer groups [0.87], neighborhood associations [0.87], learning or cultural groups [0.87], activities intended to teach skills or pass experiences to others [0.85], hobby groups [0.81], and sports groups or clubs [0.80]; P<0.05), than no social participation. Additionally, individuals who participated in more types of social participation were at a lower risk of frailty than those with no social participation (P for trend <0.001).Conclusions　The risk of frailty onset was lower among individuals who participated in eight types of social participation at baseline and among those who participated in more types of social participation than those with no social participation. The results suggest that social participation is a useful measure to prevent frailty for extending healthy life expectancy.

Association between diversity levels of member composition in group activities of older adults and the occurrence of need for care: the JAGES 2013-2019 longitudinal study

BACKGROUND

Participating in groups with diverse members is associated with improved health among older adults. The study examined the relationship between diversity of group members and needed support or long-term care.

METHODS

We conducted a longitudinal study for the Japan Gerontological Evaluation Study with 61,281 participants aged ≥ 65 years who were surveyed in 2013 and followed-up for six years. We assessed three dimensions of the diversity of the participating members (sex, age, and region of residence). We then graded the diversity level into four categories: level 0 (not in any group), level 1 (in a group without diversity or in a group with diversity in one of the three factors), level 2 (in a group with diversity in two of the three factors), or level 3 (in a group with diversity across all factors). We adjusted for 12 covariates using Cox hazard survival analysis models with hazard ratios (HRs) and 95% confidence intervals (CIs) estimated for the association between group members' diversity levels and needed support or long-term care. The same study was conducted when stratified by employment status at baseline.

RESULTS

Participants in social participation groups with more diverse group members had a lower incidence of needed support or long-term care as compared to their counterparts. Compared to those with no participation group, HR decreased by 14% to 24% with increasing levels of diversity. The HR for the level of care needed for participants in the social participation group with high residential diversity was 0.89 (95% CI: 0.84-0.94). For participants who were currently unemployed, HR reductions ranged from 16%-28% with increasing levels of diversity compared to the non-participating group. No association was found for employed participants.

CONCLUSIONS

The reason the HRs of Japanese elderly people certified as needing support or care are lower when the diversity of participating groups is higher could be owing to the presence of a variety of people and the diversification of social networks, which facilitates the building of bridging social relational capital. Public health policies that encourage participation in diverse organizations will be important in the future.

Frequency of social participation by types and functional decline: A six-year longitudinal study

Social participation is effective for preventing functional decline in older people. However, researchers have not fully explored how different frequencies of social participation by type. We aimed to clarify the relationship between the frequency of social participation by type and functional decline. We used data from the Japan Gerontological Evaluation Study, which consists of individuals aged 65 years and older who were not eligible to receive public long-term-care insurance benefits. From 13 municipalities, 51,968 respondents who met the criteria were included in the analysis. We used a sex-stratified Cox proportional hazards model. The outcome was the new incidence of functional decline during a six-year follow-up, and the exposure was the frequency of social participation of one of the following six types: sports, hobbies, volunteering, neighborhood, senior clubs, and industry groups. The frequency was categorized as "never," "a few times a year," "once or twice a month," and "once a week or more." We set non-participation in each activity as the reference, and we adjusted for 12 potential confounders (i.e., sociodemographic and health-related factors). After we adjusted for confounders, participation in sports and hobbies once or twice a month, once a week or more was protectively associated with functional decline. We found a similar association for participation in neighborhood a few times a year. Our findings demonstrate the importance of considering the effects of different types and frequencies of activities when promoting social participation among older people as part of public health policies.

Participation in Community Gathering Places and Subsequent Health and Well-Being: An Outcome-Wide Analysis

Background and Objectives

Evidence remains inadequate regarding the benefits of participation in community gathering places, which is Japan's primary strategy for preventing functional disability in older adults, in other domains of health and well-being. This longitudinal study examined the associations of participation in community gathering places with an array of subsequent health and well-being outcomes among older adults.

Research Design and Methods

We used 3-wave data (2013, 2016, and 2019) from Japan Gerontological Evaluation Study (n = 5 879 or 4 232 depending on the outcome). Our exposure was participation in community gathering places in 2016. We assessed 34 health/well-being outcomes in 2019 across 6 domains. We adjusted for pre-baseline covariates including prior outcome values in 2013.

Results

Compared with nonparticipation, participation in community gathering places was associated with some outcomes in the following 3 domains: physical/cognitive health (better higher-level functional capacity), social well-being (more frequent participation in hobby groups, senior citizens clubs, learning or cultural groups, and seeing more friends within a month), and prosocial/altruistic behaviors (more frequent participation in volunteering; after Bonferroni correction as p < .0015, .05/34).

Discussion and Implications

Evidence was mixed and more modest for the outcomes in three other domains, mental health, psychological well-being, and health behaviors. Promoting participation in community gathering places may not only fulfill its original goal (ie, preventing functional disability) but also enhance other domains of human well-being, potentially by increasing social interactions.

Group leisure activities are associated with a lower risk of dementia than individual leisure activities: A 6-year longitudinal study from the Japan Gerontological Evaluation Study (JAGES)

Participating in group leisure activities may lower the risk of dementia compared with doing leisure activities alone. However, only some studies have examined the differences. In this study, we sought to determine whether the incidence of dementia risk differs according to the implementation status of leisure activities (participation in a group or alone). The association between the implementation status of leisure activities and the risk of dementia was examined using Cox proportional hazards models in the 6-year (2010-2016) cohort data of 50,935 participants (23,533 males and 27,402 females) aged 65 years or older of the Japan Gerontological Evaluation Study. Over six years of follow-up, 5395 respondents (10.6%) developed dementia. After adjusting for potential confounders, such as depression and social support, the implementation status of leisure activities was associated with a lower dementia risk in participants who engaged in group leisure activities (hazard ratio [HR], 0.79; 95% confidence interval [CI], 0.73-0.85) and a higher dementia risk in those without leisure activity (HR, 1.30; 95% CI, 1.22-1.39), in comparison with those engaging in leisure activities alone. Engagement in group leisure activities may be associated with a reduced risk of dementia.

Social participation and incident disability and mortality among frail older adults: A JAGES longitudinal study

BACKGROUND

Frailty is the highest risk factor for incident disability and mortality. Social participation is a modifiable factor for reducing adverse outcomes among independent older adults. However, the association between social participation and incident disability and mortality among frail older adults remains unclear. Therefore, we examined the association between various social activities and incident disability and mortality.

METHODS

This nationwide prospective cohort study (The Japan Gerontological Evaluation Study) recruited older adults with frailty, aged 65 years and older (N = 9090) who were followed up for 6 years (2010-2016). We examined incident disability and all-cause mortality at the end of the follow-up period. Frailty was assessed using the Kihon Checklist. The independent variable was social participation in 2010, grouped into the following seven categories: hobby groups, sports groups or clubs, volunteer groups, senior citizens' clubs, industries, neighborhood communities, and paid work.

RESULTS

The incidence of disability among participants was 19.5% (1770) and that of mortality was 19.2% (1753). Belonging to sports groups or clubs (Hazard Ratios [HR] = 0.74; 95% Confidence Interval [CI] = 0.57, 0.98) or hobby groups (HR = 0.77; 95% CI = 0.60, 0.98) was significantly associated with a lower risk of incident disability. Meanwhile, hobby groups (HR = 0.68; 95% CI = 0.56, 0.83), sports groups or clubs (HR = 0.71; 95% CI = 0.57, 0.88), volunteer groups (HR = 0.69; 95% CI = 0.54, 0.88), and senior citizens' club (HR = 0.75; 95% CI = 0.61, 0.90) were associated with lower risk of incident mortality.

CONCLUSIONS

Social participation was associated with a lower risk of incident disability and mortality, not only in healthy older adults but also in frail older adults who are at higher risk of incident disability and mortality. This suggests that frail older adults should be encouraged to participate in all the seven types of social participation examined in this study, as this may lower the risk of subsequent disability and mortality.

Does social participation foster social support among the older population in Japan? A three-year follow-up study from the Japan gerontological evaluation study

•Whether social participation has generated new, healthier social support is unclear.•We prospectively examined whether social participation fosters social support.•Social support was dose-responsive to the number of types of social participation.•Social support was fostered by participating in some type of group at any frequency.•Support to encourage social participation may be effective to enhance social support.

Social isolation and subsequent health and well-being in older adults: A longitudinal outcome-wide analysis

BACKGROUND

Social isolation has become a serious public health issue. However, most previous studies examine the relationship between social isolation and a single outcome. We aimed to conduct holistic assessments to understand the multidimensional impacts of social isolation on health and well-being.

METHODS

We used the three-wave data (2013, 2016, and 2019) obtained from the Japan Gerontological Evaluation Study. Our exposure, obtained from the 2016 survey, was the Social Isolation Index (SII) comprising five components: no partner, poor interaction with children, poor interaction with relatives, poor interaction with friends, and no social participation). We assessed 36 health and well-being outcomes across six dimensions obtained from the 2019 survey: physical/cognitive health, health behaviours, mental health, subjective well-being, social isolation, and cognitive social capital. Pre-exposure characteristics and prior outcome levels in 2013 were adjusted. We included 47,318 respondents for 4 outcomes (death, dementia, and functional disability) and 34,187 respondents for 32 other outcomes. The Bonferroni correction was used to correct for multiple tests.

RESULTS

The total SII scores were associated with a wide range of health and well-being outcomes across the six dimensions. Specifically, we found a robust association between an SII score of four or greater with mortality (Odds ratio: 1.89; 95% CI: 1.46-2.43). Among the five components of the SII, poor interaction with friends and no social participation showed robust associations with a wide range of health and well-being. We also found some robust evidence regarding effect modification by gender and age in the associations between the components of the SII and health and well-being.

CONCLUSIONS

Social isolation, specifically social interaction with friends and social participation, may affect a wide range of health and well-being among older adults.

Video call and depression among older adults during the COVID-19 pandemic in Japan: The JAGES one-year longitudinal study

Evidence of video call on preventing late-life depression during the COVID-19 pandemic is limited. We examined the associations of social contact (in-person, voice call, and video call) with incidence of depressive symptoms and evaluated whether specific factors (particularly, age and change in the frequency of in-person contact) affect these associations. We used longitudinal data from the 2019 and 2020 waves of the Japan Gerontological Evaluation Study, including 10,523 participants aged ≥65 years in 10 municipalities. Depressive symptoms were measured by the 15-item Geriatric Depression Scale (GDS-15) score ≥5 in main analysis, and GDS-15 score ≥4, 10, or continuous variable in sensitivity analyses. Social contact represented frequency changes before and during the pandemic: non-contact (reference), decreased-contact, maintained-contact, and increased-contact. We employed modified Poisson regression analysis. Compared to non-contact of video call, the association of increased-contact of video call with depressive symptoms was insignificant in main analysis (GDS-15 ≥ 5: risk ratio (RR) = 0.89, 95% confidence interval (CI): 0.79-1.01), whereas significant in sensitivity analyses (GDS-15 ≥ 4: RR = 0.89, 95% CI: 0.82-0.98; GDS-15 ≥ 10: RR = 0.71, 95% CI: 0.53-0.97; GDS-15 = continuous variable: Β = -0.17, 95% CI: -0.33 to -0.002). In-person contact was significantly associated with lower incidence of depressive symptoms (non-contact: reference; maintained-contact: RR = 0.92, 95% CI: 0.85-0.99; increased-contact: RR = 0.84, 95% CI: 0.77-0.91), whereas voice call was not. Age and change in the frequency of in-person contact did not show significant effect modifications on the associations of video call with incidence of depressive symptoms after Bonferroni correction for multiple testing. In conclusion, this study suggests that the evidence supporting video call as a way to protect against depressive symptoms among older adults during the pandemic appears weak compared to the evidence for in-person contact.

[Changes in the neighborhood food environment and walking time among older adults: A longitudinal Japan Gerontological Evaluation Study (JAGES) between 2016 and 2019]

Objective　Maintaining or increasing walking provides several health benefits to older adults. However, the mid-term evaluation of Health Japan 21 [second term] showed that older adults' daily steps did not meet the goal. Therefore, this study emphasized primordial prevention, which is different from previous preventive approaches and focuses on the relationship between the built environment and physical activities, including daily steps. This study investigated the relationship between changes in the number of food stores and walking time.Methods　This longitudinal study utilized the self-administered mail survey data between 2016 and 2019 from the Japan Gerontological Evaluation Study (JAGES). Older adults aged ≥65 years and residing in 27 independent municipalities were recruited. The dependent variable was a change in the walking time at two-time points (increase or not). Our explanatory variable was the change in the number of food stores at two-time points, reported on a 5-point scale, including no store (reference), increased stores, store available, decreased stores, and I don't know. Equivalently, it was defined as the self-reported change in the number of food stores (stores that sell meats, fish, fruits, and vegetables) within the walking distance of participants' homes (within ～1 km) from 2016 to 2019. The covariates included demographic factors, health behavior factors, environmental factors, and health factors in 2016. We used Poisson regression analysis (5% significance level) to calculate the cumulative incidence rate ratio (CIRR) and 95% confidence interval (CI) for an increase in walking time compared to no increase in walking time. The multivariate normal imputation method supplemented missing data of the dependent variable, explanatory variable, and covariates. Additionally, respondents' answer of "other" for the covariates was supplemented.Results　Three years later, 13,400 (20.4%) respondents had increased their walking time. Older adults who reported increased number of stores (5,311, 8.1%) had more walking time than those who reported no stores (6,577, 10.0%) (CIRR=1.12; 95% CI: 1.03-1.21).Conclusion　Participants who reported an increase in the number of fresh food stores within the walking distance had 12% more walking time three years later. A built environment might be used to measure primordial prevention that increases the amount of walking in daily life. Our results may provide evidence for policymakers and stakeholders to consider healthy urban planning.

Family social support and stability of preferences regarding place of death among older people: a 3-year longitudinal study from the Japan Gerontological Evaluation Study

BACKGROUND

it remains unclear how family relationships could affect stability of end-of-life care preferences.

OBJECTIVE

to describe change patterns of preferred place of death (POD) among older people and to examine associations between family social support and stability of preferences regarding POD.

METHODS

this longitudinal study of 1,200 noninstitutionalized independent Japanese older people aged over 65 years used panel data between 2016 and 2019 from the Japan Gerontological Evaluation Study (JAGES). Preference stability was defined as the congruence of preferred POD based on questionnaires between baseline and follow-up. We performed multiple logistic regression analysis and gender-stratified analysis to examine associations between social support (spouse, children living together and children living apart) and preference stability.

RESULTS

only 40.9% of participants had stable preferences. For a spouse, both receiving and providing social support was associated with less stable preferences (OR: 0.63, 95% CI: 0.43-0.93; OR: 0.55, 95% CI: 0.38-0.80, respectively), and providing social support to children living apart was associated with more stable preferences (OR: 1.35, 95% CI: 1.03-1.76). In gender-stratified analysis, significant associations between preference stability and providing social support to a spouse among women (OR: 0.53, 95% CI: 0.34-0.82) and providing social support to children living apart among men (OR: 1.72, 95% CI: 1.16-2.55) were observed.

CONCLUSIONS

family social support was associated with the stability of preferences, and the associations differed by support resources and gender. Incorporating family members in the process of end-of-life care discussion may be necessary for establishing stable preferences.

The association between street connectivity and depression among older Japanese adults: the JAGES longitudinal study

Mental health is important in older age; neighborhood environment is considered a protective factor of depression. Research has established that a critical indicator of neighborhood environment, street connectivity, is related to older people's health. However, little is known about the relationship between street connectivity and depression. We examined the relationship between street connectivity and depression among older people. Using Japan Gerontological Evaluation Study 2013-2016, the target population comprised 24,141 independent older people without depression (Geriatric Depression Scale scores below 5) in 2013. The outcome variable was depression in 2016; the explanatory variable was street connectivity calculated by intersection density and space syntax within 800 m around the subject's neighborhood in 2013. We used logistic regression analysis to calculate the odds ratio and 95% confidence interval for the new occurrence of depression among participants in 2016. This analysis demonstrated incidence of new depression after 3 years that is 17% and 14% lower among participations living in high-intersection density and high-street-connectivity areas, respectively, than those living in low-intersection density and low-street-connectivity areas. The association held after adjusting for physical activities and social interaction. Given the established connection between street connectivity and mental health, the findings can contribute to healthy urban planning.

Predictive validity of the modified Kihon Checklist for the incidence of functional disability among older people: A 3-year cohort study from the JAGES

AIM

The original Kihon Checklist, validated to predict the incidence of functional disability, has been modified to capture both functional ability (can/cannot) and performing state (do/do not). However, the predictive validity of the modified Kihon Checklist remains unverified. Therefore, this study intends to verify the predictive validity of the modified Kihon Checklist and to clarify whether predictive discrimination differs between the classification method of functional ability and performing state.

METHODS

The participants comprised 67 398 older people who responded to the Japan Gerontological Evaluation Study (2016). They were followed for 3.1 years on average. Cox's proportional hazards model with incidence of functional disability as the endpoint was used to calculate the hazard ratio, adjusted for sex and age. The independent variables were judged by two classification methods, functional ability and performing state, using nine indicators based on the modified Kihon Checklist. Additionally, we examined whether the two classification methods produced different C-index estimates.

RESULTS

Incidence of functional disability occurred in 6232 participants (9.2%). The adjusted hazard ratio of those to whom the nine indicators applied was significantly higher than that of those to whom they did not. The range of the hazard ratio was 1.50-3.82 for both classification methods. The C-index was slightly higher when the classification was based on performing state than when it was based on on functional ability.

CONCLUSIONS

Although predictive discrimination was slightly higher for the performing state than for functional ability, the predictive validity of the modified Kihon Checklist was confirmed for both. Geriatr Gerontol Int 2022; ••: ••-••.

Mortality risk in older Japanese people based on self-reported dyslipidemia treatment and socioeconomic status: The JAGES cohort study

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Older people under self-reported dyslipidemia treatment had some distinction.

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They had higher income and education levels than those without treatment.

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Their self-reported treatment status was negatively associated with mortality risk.

Few studies consider socioeconomic status when assessing mortality risk in dyslipidemia cases. This study used cohort data from the 2010 Japan Gerontological Evaluation Study (JAGES), which contains data on older Japanese people, to associate socioeconomic status with mortality risk in patients treated for dyslipidemia. In this 6-year longitudinal study, we examined 47,275 older Japanese people aged ≥ 65 years who could independently perform activities of daily living. Patients’ background characteristics were classified based on their dyslipidemia treatment status and were assessed using the chi-squared test. The mortality risk was assessed using the Cox proportional hazards model, wherein the objective and explanatory variables were total mortality and self-report of dyslipidemia treatment, respectively. The participants were stratified by sex and age into younger (aged 65–74 years) and older (aged ≥ 75 years) groups of men and women. The results were adjusted, with health condition, health behavior, and socioeconomic status as confounding factors. The adjusted hazard ratios of 5514 people who died during the follow-up who had self-reported dyslipidemia treatment were 0.49 [95% confidence interval (CI) 0.35–0.69] for younger men; 0.57 (95% CI 0.42–0.76) for older men; 0.52 (95% CI 0.34–0.80) for younger women; and 0.47 (95% CI 0.33–0.67) for older women. Older people undergoing treatment for dyslipidemia had factors beneficial for health, such as good socioeconomic status. Despite considering these factors, individuals undergoing dyslipidemia treatment had a negative association with mortality risk.

[Promoting community gathering places "Kayoinoba" for healthy aging reduce health inequalities among communities: An eight-year ecological study]

Objectives　This study aimed to investigate whether health inequalities among communities would be reduced by intensively enhancing the "Kayoinoba" program in model communities where many high-risk, older adults live.Methods　Kobe City and the Japan Gerontological Evaluation Study created a mail survey for older adults in 78 communities (community ≈ junior high school district) to conduct community diagnosis. Sixteen communities showed poor values along multiple dimensions of risk and required priority measures. From 2014 to 2019, we designated these 16 communities as model communities. Then, municipal officials and researchers cooperated to support the establishment and management of "Kayoinoba." By using four-waves of mail survey data (in 2011, 2013, 2016, and 2019 with n=8,872, 10,572, 10,063, and 5,759, respectively), secular transitions of nine intermediate outcome indicators (three=social participation, two=social network, and four=social support) and five health outcome indicators (physical function, malnutrition, oral function, cognitive function, and depressive symptoms) were compared between model (n=16) and non-model (n=62) communities via multilevel mixed-effects linear regression analysis.Results　In the 2011 and 2013 surveys, model communities showed poor value compared to the non-model communities in 13 of the 14 indicators. A significant interaction between the year and model/non-model communities was confirmed for four intermediate outcome indicators (sports and hobby group participation, number of friends met, and providing emotional support) and three health outcome indicators (oral function, cognitive function, and depressive symptoms). The differences were reduced or eliminated in the 2016 and 2019 surveys. For example, hobby group participation in 2011 was 29.7% vs. 35.0% in model vs. non-model communities; the difference narrowed to 35.2% vs. 36.1% (P=0.008). Similarly, providing emotional support increased from 83.9% vs. 87.0% to 93.3% vs. 93.3% (P=0.007). Depressive symptoms decreased from 31.4% vs. 27.2% to 18.6% vs. 20.3% (P<0.001).Conclusions　Promoting community gathering places "Kayoinoba" for six years in communities where many high-risk older adults live may foster social participation, networking, and support and may help reduce health inequalities among communities.

[Mental distress during the COVID-19 pandemic among mothers of young children and the related factors: A focus on their difficulties in raising their child, concerns about their child's development, social support, and capacity to receive support]

Objectives　We examined the relationships between the development of severe mental distress among mothers of young children during COVID-19 and the related factors including difficulties in raising child, concerns about child's development, social support, and capacity to receive support using comparable pre-COVID-19 baseline data. Severe mental distress was defined by a score of K6≧10 on the Psychological Distress Scale.Methods　We conducted a baseline survey in February 2020 and obtained responses from 4,700 mothers of young children. A follow-up survey was conducted in June 2020. We obtained responses from 2,489 participants of the original group. The K6 scores (four groups) of two surveys were compared. Thereafter, 521 participants who had severe mental distress at the baseline were excluded, and 1,968 participants were included in the Poisson regression analysis. We adjusted for maternal age, education, marital and employment status, household income, children's age, number of children, and changes during COVID-19 pandemic. The adjusted incident rate ratios (IRRs) were estimated using K6≧10 at follow-up as the dependent variable, and the independent variables were having difficulty in raising a child, concerns about child's development, social support, and capacity to receive support.Results　At the baseline, 20.9% of mothers had severe mental distress. At follow-up, this value increased significantly to 25.3%. Mothers who developed severe mental distress by the time of the follow-up survey were 333 (16.9%), and they were more likely to have had difficulty in raising their child, concerns about child's development, lower levels of positive attitudes toward receiving support (capacity to receive support), and lower levels of social support.Conclusions　The mental health of mothers caring for young children worsened during the COVID-19 outbreak. Factors related to the development of severe mental distress included having difficulty in raising a child, concerns about child's development, and lower levels of positive attitudes toward receiving support (capacity to receive support) and lower levels of social support. Providing parenting support, consultation and rehabilitation, and exploring approaches to enhance capacity for receiving support are required.

Suggesting Indicators of Age-Friendly City: Social Participation and Happiness, an Ecological Study from the JAGES

Ascertaining progress in building age-friendly cities (AFCs) requires community diagnostic indicators. This study examines the relationship between social participation and happiness at the municipal level. The data from the Japan Gerontological Evaluation Study (JAGES) from 2013, 2016, and 2019, comprising 442,079 older people from 289 municipalities, are used. We also employ linear mixed-effects models to evaluate the association between social participation and happiness. In these models, we adjust for seven variables as potential confounders. This study reveals that the higher the social participation, except for neighborhood association, the higher the state of happiness (B = 0.14-0.30). Our study suggests that social participation is useful, as a community diagnostic indicator, for monitoring the progress of building AFCs, developing strategies, and creating evidence.

Association between Increasing Social Capital and Decreasing Prevalence of Smoking at the Municipality Level: Repeated Cross-Sectional Study from the JAGES

As smoking cessation is crucial for both individual and public health, this study aimed to elucidate the association between changes in social capital and in terms of smoking at the level of municipal units in Japan. Using repeated cross-sectional data from the Japan Gerontological Evaluation Study, we analyzed data from adults aged 65 years or older from 69 municipal units that participated in two survey waves. We received valid responses from 91,529 and 86,403 older people in 2013 and 2019, respectively, and aggregated all variables by municipal units. For the dependent variable, we used the units’ prevalence of smoking for both years. The independent variables were the percentages of social capital indicators, such as social participation, social cohesion, and reciprocity for each of the 69 municipal units. The mean prevalence of smoking increased from 9.7% in 2013 to 10.2% in 2019. Multiple regression analysis revealed that increases in the percentages of sports group participation, receiving emotional and instrumental social support, and reciprocity were significantly associated with decreased prevalence of smoking, after we adjusted for confounding variables. This study indicates that building social capital might be useful in promoting smoking cessation and that its indicators could be useful in monitoring efforts.

Predictors of happiness during the COVID-19 pandemic in mothers of infants and/or preschoolers: a pre-COVID-19 comparative study in Japan

BACKGROUND

Happiness may help to prevent negative physiological outcomes in response to life events; however, factors contributing to happiness during the COVID-19 pandemic have not been longitudinally investigated. This study explored the predictors of happiness in mothers of young children in Japan using comparable data that were obtained before and during the COVID-19 pandemic.

METHODS

We conducted the baseline survey in February 2020, and 4 months later, we also conducted the follow-up survey. Throughout all 47 prefectures in Japan, 4,700 (100 respondents/prefecture) mothers of infants and/or preschoolers (0-6 years) participated in the baseline online survey; 2,489 of these also participated in the follow-up survey.

RESULTS

We performed hierarchical multiple regression analysis and our final model indicated that maternal happiness during COVID-19 pandemic was positively related to employment status (homemaker, β = 0.052, p = 0.014), levels of available social support (average, β = 0.052, p = 0.012, high, β = 0.055, p = 0.010) and happiness score before the pandemic (β = 0.467, p < 0.001), and satisfaction toward the measures against the COVID-19 at partners' workplace (average, β = 0.129, p < 0.001; high, β = 0.279, p < 0.001), preventive behavior against COVID-19 (average, β = 0.055, p = 0.002; high, β = 0.045, p = 0.015) and positive attitudes/thinking (β = 0.087, p < 0.001) during the pandemic. In contrast, poor mental health (K6 ≥5, β = -0.042, p = 0.011) before the pandemic and negative changes during the pandemic (≥3, β = -0.085, p < 0.001) were negatively related to maternal happiness during the pandemic. Our final model explained 44.9% of the variance in mothers' happiness during the COVID-19 pandemic.

CONCLUSIONS

Satisfaction toward the measures against the COVID-19 at partners' workplace, preventive behavior, and positive attitudes/thinking were especially important for maternal happiness during the COVID-19 pandemic. Future study is needed to consider measures against infectious diseases in the workplace that are desirable for the well-being of parents with young children, taking into account the gender perspective.

Social participation and change in walking time among older adults: a 3-year longitudinal study from the JAGES

BACKGROUND

Among all physical activities, walking is one of the easiest and most economical activities for older adults' mental and physical health. Although promoting social participation may extend the walking time of older adults, the longitudinal relationship is not well understood. Thus, this study elucidates the relationship between nine types of social participation and change in walking time during a 3-year follow-up of older adults.

METHODS

We conducted a 3-year community-based longitudinal study of independent older adults in Japan. From the 2016 and 2019 surveys, we extracted 57,042 individuals. We performed multiple regression analyses, estimating associations between change in walking time after three years and nine types of social participation in 2016: volunteer, sports, hobby, senior, neighborhood, learning, health, skills, and paid work. We conducted subgroup analysis stratified by walking time in 2016 (i.e., < 60 or ≥ 60 min/day).

RESULTS

The mean (standard deviation) change in walking time for 3 years was - 4.04 (29.4) min/day. After adjusting potential confounders, the significant predictors of increasing or maintaining walking time (min/day) were participation in paid work (+ 3.02) in the < 60 min/day subgroup; and volunteer (+ 2.15), sports (+ 2.89), hobby (+ 1.71), senior (+ 1.27), neighborhood (+ 1.70), learning (+ 1.65), health (+ 1.74), and skills (+ 1.95) in the ≥ 60 min/day subgroup compared with non-participants.

CONCLUSIONS

Paid work and community activities may be effective for maintaining or increasing walking time among older adults with less (< 60 min/day) and sufficient (≥ 60 min/day) walking time, respectively.

[Does participation in community gatherings suppress aggravation of functional decline risk among older people? A study based on 2013-2016 data from the Japan Gerontological Evaluation Study]

Objective　Through the amendment of the Long-Term Care Insurance Law in 2014, Japan's Ministry of Health, Labour and Welfare established a general long-term care and prevention project centered on "Kayoinoba" to promote participation in social and physical activities for older people, which included environmental approaches for individual health and well-being through community-building. However, reports show that the effectiveness of long-term care and prevention in Kayoinoba across multiple municipalities is limited. The purpose of this study was to verify the effect of participation in Kayoinoba in reducing the risk of functional decline among older people, using data from 24 municipalities of 10 prefectures nationwide.Methods　This study examined self-administered mail survey data from the Japan Gerontological Evaluation Study. The participants were older people aged ≥65 years who lived in 24 municipalities of 10 prefectures, in 2013 and 2016. The dependent variable was an increase in total score of ≥5 points on a risk assessment scale predicting incident functional disability ("incident functional disability risk score")(Tsuji et al., 2018), and the explanatory variable was existence of participation in a Kayoinoba program. Nine variables were used as the covariates: educational attainment, equivalent income, depression, smoking, drinking, instrumental activities of daily living, incident functional disability risk score in 2013 (including sex and age), living status (whether the person lived alone), and employment status in 2013. We conducted Poisson regression analysis with stratification of the participants into two groups according to age: young older people and old older people. Sensitivity analysis of the possible increase of ≥3 or 7 points in the incident functional disability risk score was also conducted.Results　Of the 3,760 participants in the study, 472 (316 young older people and 156 old older people)[12.6% (11.8%, 14.5%)] participated in Kayoinoba. Compared with those who did not participate in Kayoinoba, the incidence rate ratio (IRR) of increase in risk assessment score was 0.88 (95% confidence interval: 0.65-1.18) for all who did participate, 1.13 (0.80-1.60) in the young older people and 0.54 (0.30-0.96) in the old older people, and was significant in the latter. In addition, similar results were obtained in the sensitivity analysis with the dependent variable as an increase in total score of ≥3 or 7 points on the risk assessment scale predicting incident functional disability.Conclusions　Compared with those who did not participate in Kayoinoba, functional decline risk was suppressed in those who did participate. The IRR was suppressed 46% in old older people. Promoting participation in Kayoinoba may effectively prevent the need for long-term care in old older people.

Plasma MMP-9 Levels as the Future Risk of Conversion to Dementia in ApoE4-Positive MCI Patients: Investigation Based on the Alzheimer's Disease Neuroimaging Initiative Database

BACKGROUND

Matrix metalloproteinase 9 (MMP-9) has been reported to be correlated with declines in hippocampal volume and cognitive function in ApoE4-positive MCI patients.

OBJECTIVES

The present study was aimed to investigate the effects of plasma matrix MMP-9 on the conversion risk between mild cognitive impairment (MCI) patients with and without ApoE4.

DESIGN AND SETTING

Retrospective observational study using the data extracted from the Alzheimer's Disease Neuroimaging Initiative database.

PARTICIPANTS

We included 211 ApoE4-positive MCI subjects (ApoE4+ MCI) and 184 ApoE4-negative MCI subjects (ApoE4- MCI).

MEASUREMENTS

We obtained demographic and data including plasma MMP-9 levels at baseline and longitudinal changes in Clinical Dementia Rating (CDR) up to 15 years. We compared conversion rates between ApoE4+ MCI and ApoE4- MCI by the Log-rank test and calculated the hazard ratio (HR) for covariates including age, sex, educational attainment, drinking and smoking histories, medications, and plasma MMP-9 levels using a multiple Cox regression analysis of ApoE4+ MCI and ApoE4- MCI.

RESULTS

No significant differences were observed in baseline plasma MMP-9 levels between ApoE4+ MCI and ApoE4- MCI. High plasma MMP-9 levels increased the conversion risk significantly more than low plasma MMP-9 levels (HR, 2.46 [95% CI, 1.31-4.48]) and middle plasma MMP-9 levels (HR, 1.67 [95% CI, 1.04-2.65]) in ApoE4+ MCI, but not in ApoE4- MCI.

CONCLUSION

Plasma MMP-9 would be the risk of the future conversion to dementia in ApoE4+ MCI.

[Associations between group exercise and exercise adherence among older community-dwelling adults who attend a community sports club: Resol no Mori Wellness Age Club Longitudinal Study]

AIM

This study aimed to examine the relationship between group exercise and exercise adherence among older community-dwelling individuals who attended a community sports club and to discuss the exercise programs that promoted exercise habits.

METHODS

A total of 227 participants (117 women and 110 men), aged ≥ 65 years, who participated in the exercise programs (Wellness Age Club), provided by Resol no Mori, for at least 6 months from June 2017 to March 2019, were included in the analysis. Results obtained from the semi-annual questionnaire surveys, physical fitness tests, and annual medical check-ups were used, along with data on individual participation in programs and dates of participation. "Exercise adherence" was defined as participation in exercise programs for an average of ≥ 2 days per week for at least 24 weeks. "Group program participation" was defined as participation in group programs for an average of one or more times per week. The relationship between group program participation and exercise program adherence was analyzed using Poisson regression analysis.

RESULTS

Group program participants were more likely to continue attending exercise programs in comparison to non-participants (Prevalence ratio=3.63 [95% CI: 1.98-6.65], p< 0.01). There was also a significant positive association between group program participation and exercise adherence among women (8.08 [1.94-33.56], p< 0.01) and men (2.84 [1.39-5.78], p< 0.01).

CONCLUSIONS

Our results suggest that group exercise programs increased social interaction among participants and promoted exercise adherence. Encouraging older people to attend group exercise may increase the number of older people who regularly exercise.

Increased frequency of participation in civic associations and reduced depressive symptoms: Prospective study of older Japanese survivors of the Great Eastern Japan Earthquake

RATIONALE

Few studies have examined whether changes in participation in civic associations can mitigate depressive symptoms among older disaster survivors.

OBJECTIVES

We examined prospectively the association between changes in participation in civic associations and changes in depressive symptoms among older survivors of the 2011 Great Eastern Japan Earthquake.

METHODS

We analyzed questionnaire-based survey data on pre- and post-disaster participation in civic associations and depressive symptoms compiled for 3567 respondents aged 65 years and above. Changes in these symptoms were assessed using a 15-item Geriatric Depression Scale (GDS) as a continuous variable for 2010 and 2013. We investigated four types of civic associations: sports, hobby, voluntary groups, and senior citizens' clubs. Changes in participation were calculated by subtracting the participation frequency measured in 2010 from that measured in 2013. Applying 95% confidence intervals, we used linear regression models with imputation to estimate the age- and sex-adjusted and multivariate-adjusted standardized coefficients.

RESULTS

The survivors' GDS scores increased by 0.13 points on average between the pre-disaster and post-disaster periods. Average changes in the participation frequencies of respondents in each group were respectively +0.36 days/year, -5.63 days/year, +0.51 days/year, and -1.45 days/year. Increased frequencies of participation in the sports and hobby groups were inversely associated with changes in GDS scores (B = -0.003, Cohen's f² = 0.10, P = 0.01 and B = -0.002, Cohen's f² = 0.08, P = 0.04, respectively). The associations did not differ depending on the experience of housing damage caused by the disaster. In addition, we did not observe a significant association between changes in participation frequencies for voluntary groups or senior citizens' clubs and changes in GDS scores after multivariable adjustment.

CONCLUSIONS

Depressive symptoms of older adults post-disaster may be mitigated through increased frequency of participation in sports and hobby groups; yet, civic participation did not mitigate the adverse impact of disaster experiences on mental health.

Acute Graft Rejection and Formation of De Novo Donor-Specific Antibodies Triggered by Low Cyclosporine Levels and Interferon Therapy for Recurrent Hepatitis C Infection After Liver Transplantation: A Case Report

BACKGROUND

We report a case of acute rejection of a liver graft, together with the occurrence of de novo donor-specific antibodies (DSAs), in a 53-year-old Japanese man who had undergone deceased-donor liver transplantation.

METHODS

The graft rejection was triggered by low cyclosporine levels and pegylated interferon treatment for the recurrence of hepatitis C virus (HCV) infection 18 months after transplantation. Although the graft was ABO-compatible, pre-formed DSA B51 was detected; therefore, total plasma exchange was performed and intravenous rituximab (500 mg/body) was administered before transplantation.

RESULTS

DSA was absent 6 months after transplantation. HCV recurrence was treated with pegylated interferon-α-2a. Renal function deteriorated with this anti-HCV therapy, with serum cyclosporine levels decreasing to 50 ng/mL. A rapid virologic response was achieved, but liver function deteriorated after 3 months of anti-HCV therapy, with histologic evidence of acute cellular rejection and formation of de novo DSAs. Anti-thymocyte globulin was administered for 5 days, which led to immediate improvement in liver function. However, renal function declined, warranting hemodialysis. The patient recovered 2 months after acute rejection, although de novo DSAs persisted.

CONCLUSIONS

Careful immunologic monitoring may be required for patients receiving interferon therapy for HCV infection to maintain sufficient blood levels of immunosuppressive agents and to prevent acute liver graft rejection.

MELD and Child-Pugh Scores Are Related to Immune Status of Intrahepatic Natural Killer Cells in Liver Transplant Candidates

BACKGROUND

The role and phenotypic alterations of intrahepatic natural killer (NK) cells in liver disease were investigated. Although intrahepatic NK cells reportedly functionally deteriorate in the fibrotic liver, it remains unclear how the clinical severity of liver disease affects intrahepatic NK cells in patients with advanced liver failure.

METHODS

We analyzed the phenotypic properties of intrahepatic NK cells by using mononuclear cells extracted from ex vivo liver perfusate effluents from patients who underwent liver transplantation. The relationship between the clinical severity of liver disease and the phenotype of intrahepatic NK cells in these patients was also evaluated. To estimate the immunological responsiveness of intrahepatic NK cells, phenotypic enhancement after interleukin-2 stimulation was analyzed.

RESULTS

Intrahepatic NK cells from patients with advanced liver failure exhibited down-regulated monomodal expression of NKp46, a major activating molecule. Notably, the expression level of NKp46 decreased depending on the severity of liver disease, Model for End-Stage Liver Disease score, and Child-Pugh score rather than the etiology. After in vitro recombinant interleukin-2 stimulation, the enhancement of expression of cytotoxic molecules, NKp44, and tumor necrosis factor-related apoptosis-inducing ligand was significantly impaired in intrahepatic NK cells from patients with liver failure, concurrently with decreased expression of CD122 and interleukin-2 receptor beta.

CONCLUSIONS

Our results suggest that terminal deterioration of liver environments by chronic liver disease impairs the potential of local NK cells, depending on the severity of the deterioration. These influences of advanced liver failure on intrahepatic NK cells may be attributed to multicentric carcinogenesis in patients with liver failure.

Pharmacokinetics, efficacy and safety of daclatasvir plus asunaprevir in dialysis patients with chronic hepatitis C: pilot study

The aim of this study was to evaluate the pharmacokinetic profile of daclatasvir (DCV) and asunaprevir (ASV) dual therapy in haemodialysis patients infected with hepatitis C virus (HCV). Eighteen haemodialysis patients and 54 patients with normal renal function were treated with DCV and ASV dual therapy for 24 weeks. We evaluated the pharmacokinetic profiles of DCV and ASV and examined the rate of sustained virological response 12 weeks after the end of treatment (SVR₁₂ ) and incidence of adverse events during treatment of haemodialysis patients infected with chronic HCV genotype 1 infection. To adjust for potential differences in baseline characteristics between haemodialysis patients and patients with normal renal function, we used propensity scores case-control matching methods. Area under the plasma concentration time curve from 0 to 6 h (AUC_{0-6 h} ) of DCV was slightly lower in haemodialysis patients than in patients with normal renal function (P > 0.6). AUC_{0-6 h} of ASV was significantly lower in haemodialysis patients (P = 0.012). SVR₁₂ rates were 100% (18/18) for haemodialysis and 96.2% (52/54) for patients with normal renal function. Changes in mean log₁₀ HCV RNA levels and viral response were higher in haemodialysis patients compared to patients with normal renal function. No discontinuations due to adverse events occurred. In conclusion, DCV and ASV dual therapy for HCV infection is effective and safe with similar results in haemodialysis patients compared to patients with normal renal function.

Stent-Graft Treatment of Dissecting Aneurysm in Association with Aortic Intramural Hematoma: When Should the Procedure Be Performed?

Purpose:

To report 2 cases of stent-graft implantation for localized dissecting aneurysm during the conservative treatment of aortic intramural hematoma.

Case Reports:

One patient underwent stent-graft implantation for 2 localized dissecting aneurysms about 23 months after symptom onset. Computed tomography (CT) 1 year after the procedure demonstrated aneurysm shrinkage. In the other patient, a localized dissecting aneurysm was treated about 3 months after symptom onset, even though the intramural hematoma had not resolved. CT scanning 3 months after the procedure demonstrated aneurysm shrinkage, but also revealed poor attachment of the distal stent-graft to the aortic wall due to subsequent resolution of the hematoma.

Conclusions:

Endograft implantation for treatment of localized dissecting aneurysm associated with aortic intramural hematoma should probably not be performed before the hematoma has completely resolved.

Fc-Gamma Receptor Polymorphisms Predispose Patients to Infectious Complications After Liver Transplantation

We investigated the impact of polymorphisms in host innate immunoregulatory genes on the development of infectious complications after liver transplantation (LT). The single-nucleotide polymorphisms (SNPs) of C1QA [276A/G], FCGR2A [131H/R], and FCGR3A [158F/V], genes encoding the Fc gamma receptor (FcγR), were analyzed in 89 living donor LT recipients in relation to the occurrences of postoperative infectious complications within 30 days after LT. Consistent with a lower affinity of the isoform encoded by FCGR3A [158F] to both IgG1 and IgG3, a significantly higher incidence of bloodstream infections (BSI) was observed in the FCGR3A [158F/V or F/F] than in the FCGR3A [158V/V] individuals. The combination of FCGR2A and FCGR3A SNPs further stratified the incidence of BSI, regardless of C1QA SNP. The predominant causative pathogen of BSI in the FCGR3A [158F/F or F/V] patients was gram-positive cocci (73.3%), of which one third was methicillin-resistant Staphylococcus aureus. No differences were observed in the incidence of fungal infections or in cytomegalovirus infections with respect to the three gene polymorphisms. Our findings indicate that FcγR SNPs are predisposing factors for BSI and can predict mortality after LT. This study provides a foundation for further prospective studies on a larger scale.

Clinical efficacy of simultaneous splenectomy in liver transplant recipients with hepatitis C virus

BACKGROUND

Interferon (IFN) therapy is a well-established antiviral treatment for hepatitis C virus (HCV) - infected patients. However, susceptibility to thrombocytopenia is a major obstacle in its initiation or continuation, particularly in patients with HCV who underwent liver transplantation (LT). We previously showed that the coexistence of splenomegaly and thrombocytopenia could result in persistent thrombocytopenia after LT. Here we retrospectively evaluated the validity of this criterion for simultaneous splenectomy in recipients with HCV.

PATIENTS AND METHODS

Subjects included 36 recipients with HCV who received LT between January 2006 and February 2012 at Hiroshima University. We analyzed the spleen volume, body surface area, platelet (PLT) count, and rate of completion or continuation with IFN therapy in these recipients.

RESULT

Of these recipients, 30 did not require simultaneous splenectomy according to the criterion, and 24 actually did not receive simultaneous splenectomy. In this group, 21 (87.5%) started IFN therapy. Fifteen (71.4%) of these recipients completed or continued IFN therapy, whereas 13 (61.9%) achieved either a sustained virological response (SVR) or an end-of-treatment response. The PLT count increased to >100,000/mm(3) 1 month after LT in 16 (66.7%) recipients from this group.

CONCLUSION

Our criterion detected the PLT count outcome after LT in recipients with HCV and achieved a better SVR result after IFN therapy.

The dipeptidyl peptidase-4 inhibitor vildagliptin has the capacity to repair β-cell dysfunction and insulin resistance

The aim of the present study was to determine whether the dipeptidyl peptidase (DPP)-4 inhibitor could repair pancreatic β-cell dysfunction and insulin resistance. Ten subjects with type 2 diabetes who had never received DPP-4 inhibitor treatment were enrolled in the study. Just before and 3 months after twice-daily administration of vildagliptin (50 mg tablets), insulin secretion and insulin sensitivity were estimated using 2-compartment model analysis of C-peptide kinetics and insulin-modified minimal model parameters, respectively. The first-phase insulin secretion (CS1) was determined as the sum of the C-peptide secretion rate (CSR) from 0 to 5 min (normal range 6.8-18.5 ng/ml/min). The whole-body insulin sensitivity index (SI) was calculated using a minimal model software program (normal range 2.6-7.6×10(-4)/min/μU/ml). After vildagliptin treatment, reductions in mean (± SE) HbA1c were noted (43.28±1.53 vs. 40.98±1.77 mmol/mol; p=0.019). Vildagliptin treatment increased the area under the curve for the C peptide reactivity (CPR) (AUCCPR; 26.66±5.15 vs. 33.02±6.12 ng/ml · 20 min; p=0.003) and CS1 (0.80±0.20 vs. 1.35±0.38 ng/ml/min; p=0.037) in response to an intravenous glucose load. -Vildagliptin treatment significantly increased SI (0.46±0.27 vs. 1.21±0.48×10(-4)/min/μU/ml; p=0.037). The long-term administration of vildagliptin improved CS1 and Si suggesting that this drug has the capacity to repair impairments in pancreatic β-cell function and insulin resistance in type 2 diabetes.