A cross-sectional study of workplace social capital and blood pressure: a multilevel analysis at Japanese manufacturing companies

Association between workplace social capital and systolic blood pressure among 23 173 workers at 367 small-sized and medium-sized enterprises in Japan: a cross-sectional study

OBJECTIVES

Social capital (SC) has been shown to be inversely associated with elevated blood pressure. While SC in the workplace may also be associated with blood pressure, it has not been extensively studied. We aimed to investigate the association between workplace SC and systolic blood pressure (SBP).

DESIGN

A cross-sectional study.

SETTING

367 small-sized and medium-sized companies in Japan.

PARTICIPANTS

A total of 23 173 participants (15 991 males and 7182 females) aged ≥18 years.

EXPOSURE OF INTEREST

SC was assessed using individual responses to eight 4-point Likert questions used in the Brief Job Stress Questionnaire. Workplace SC was assessed as the mean of individual-level responses to the SC questions from those working in the same company.

OUTCOME MEASURE

Systolic blood pressure (SBP) RESULTS: A multilevel linear regression model revealed that higher workplace-level SC was linked with lower SBP (coef.=-0.53 per 1SD increment in workplace SC, 95% CI=-1.02 to -0.05) among females in the age-adjusted model, which remained statistically significant after adjusting for other covariates. After adjusting for individual-level SC, this association was attenuated and became non-significant (coef.=-0.41, 95% CI=-0.87 to 0.05), while individual-level SC was inversely associated with SBP (coef.=-0.43, 95% CI=-0.73 to -0.13). Among males, we did not find any evidence of significant inverse associations either in relation to workplace SC (coef.=-0.12, 95% CI=-0.46 to 0.21) or individual-level SC (coef.=0.19, 95% CI=-0.01 to 0.39).

CONCLUSIONS

Our study findings suggested that workplace-level SC can affect SBP differently by sex.

The Relationships between Social Capital, Metabolic, and Behavioral Risk Factors of Non-Communicable Diseases: A Systematic Review

Background

Contextual risk factors such as social capital have a vital role in affecting behavioral and biological risk factors of NCDs. We aimed to systematically identify the relationship between different aspects of social capital (SC) with metabolic, and behavioral risk factors of non-communicable diseases (NCDs).

Methods

This is a systematic review. The period of study was 2000-2021. We searched the English international databases, i.e. PubMed/Medline, Scopus, and Web of Science. Studies that reported NCDs' metabolic and behavioral risk factors as independent variables, were excluded. We also included studies if they analyzed the association between SC and metabolic and behavioral risk factors of NCDs.

Results

After the primary and quality appraisal process, 97 studies were entered in the final phase of the analysis. Five out of 18 studies reported an inverse association between SC and the level of alcohol drinking. Twenty-seven out of 32 studies reported a significant inverse association between SC and smoking and tobacco use, while only one study reported a significant positive association. Nine studies reported a significant inverse association between SC and high blood pressure. Three studies showed a significant inverse association between SC and diabetes. Seventeen studies indicated a significant positive association between SC and physical activity. Thirteen out of 17 studies reported a significant inverse association between SC, body mass index (BMI) and overweight.

Conclusion

High SC, people's participation and interaction are vital in tackling NCDs. Evidence shows positive effects of SC on prevention, control and improvement of NCDs' metabolic and behavioral risk factors.

Effect of Psychological Distress on the Association of Workplace Social Capital with Presenteeism and Sickness Absence

Greater workplace social capital (WSC) can be related to workers' health and productivity. We sought to clarify the association between horizontal WSC and presenteeism and sickness absence (SA) and to examine the effects of psychological distress on these associations among Japanese workers. A cross-sectional study was conducted in 2017 at seven large Japanese companies. Logistic regression analysis was performed with presenteeism and SA as the dependent variables, horizontal WSC as an independent variable, and sociodemographic characteristics and psychological distress as covariates. After adjustment for sociodemographic characteristics, the results showed that greater horizontal WSC was associated with lower presenteeism and SA. The odds ratios for the relationship between horizontal WSC and presenteeism and that between horizontal WSC and SA dropped moderately after adjustment for psychological distress but remained significant. Further exploration of the factors underlying the relationship between WSC and productivity is needed to confirm if WSC enhances workers' health and productivity and to inform the development of effective occupational health initiatives.

Workplace social capital and refraining from seeking medical care in Japanese employees: a 1-year prospective cohort study

OBJECTIVES

We examined the association of workplace social capital (WSC), including structural and cognitive dimensions, with refraining from seeking medical care (RSMC) among Japanese employees.

DESIGN

One-year prospective cohort study.

SETTING AND PARTICIPANTS

We surveyed 8770 employees (6881 men and 1889 women) aged 18-70 years from 12 firms in Japan using a self-administered questionnaire comprising the WSC scale and the items on potential confounders (ie, age, educational attainment and equivalent annual household income) at baseline (from April 2011 to March 2013).

OUTCOME MEASURES

At a 1-year follow-up, we measured RSMC using a single-item question 'In the past year, have you ever refrained from visiting a hospital, clinic, acupuncturist or dentist despite your sickness (including a slight cold or cavity) or injury?'

RESULTS

The results of Cox regression with robust variance showed that, after adjusting for potential confounders, the low WSC group (ie, the lowest tertile group) had a significantly higher relative risk (RR) of RSMC compared with the high WSC group (ie, the highest tertile group) among both men and women (overall WSC: RR 1.09 (95% CI 1.01 to 1.17) and 1.20 (95% CI 1.06 to 1.37); structural dimension: RR 1.13 (95% CI 1.04 to 1.22) and 1.25 (95% CI 1.07 to 1.45); and cognitive dimension: RR 1.11 (95% CI 1.03 to 1.20) and 1.21 (95% CI 1.06 to 1.38), respectively). Trend analysis using a continuous score of the WSC scale also showed a significant association of low WSC with a higher risk of RSMC among both men and women.

CONCLUSIONS

Our findings suggest that the lack of social capital in the workplace is associated with RSMC among Japanese employees.

Association Between Community-Level Social Participation and Self-reported Hypertension in Older Japanese: A JAGES Multilevel Cross-sectional Study

BACKGROUND

Many factors are associated with hypertension development. We focused on social participation as an aspect of social capital and investigated the contextual relationship between community-level social participation and hypertension using multilevel regression analyses.

METHODS

We used cross-sectional data from the 2016 Japan Gerontological Evaluation Study-a population-based study of functionally independent adults aged 65 years or older. The sample comprised 116,013 participants nested in 818 communities. Hypertension and social capital were defined by questionnaires. Social capital was assessed at both the individual and the community levels in 3 dimensions: civic participation (as an index of social participation), social cohesion, and reciprocity.

RESULTS

The prevalence rate of hypertension was 43.7%, and 44.1% of the respondents were involved in civic participation. Community-level civic participation, but not social cohesion or reciprocity, was negatively associated with hypertension in the total population (prevalence ratio (95% confidence interval): 0.98 (0.96-0.99), P = 0.004) and female group (0.97 (0.95-0.99), P = 0.015), and the association neared significance in the male group (0.98 (0.96-1.005), P = 0.13) after adjustment for individual-level social capital dimensions including civic participation, individual-level covariates, and population density as a community-level covariate. The interaction between community-level civic participation and sex in relation to hypertension was significant (P = 0.012).

CONCLUSIONS

We found a contextual preventive relationship between community-level civic participation and hypertension. The design of the contextual characteristics of communities by the promotion of social participation may help reduce the prevalence of hypertension in older people.

Psychometric assessment of a scale to measure bonding workplace social capital

OBJECTIVES

Workplace social capital (WSC) has attracted increasing attention as an organizational and psychosocial factor related to worker health. This study aimed to assess the psychometric properties of a newly developed WSC scale for use in work environments, where bonding social capital is important.

METHODS

We assessed the psychometric properties of a newly developed 6-item scale to measure bonding WSC using two data sources. Participants were 1,650 randomly selected workers who completed an online survey. Exploratory factor analyses were conducted. We examined the item-item and item-total correlations, internal consistency, and associations between scale scores and a previous 8-item measure of WSC. We evaluated test-retest reliability by repeating the survey with 900 of the respondents 2 weeks later. The overall scale reliability was quantified by an intraclass coefficient and the standard error of measurement. We evaluated convergent validity by examining the association with several relevant workplace psychosocial factors using a dataset from workers employed by an electrical components company (n = 2,975).

RESULTS

The scale was unidimensional. The item-item and item-total correlations ranged from 0.52 to 0.78 (p < 0.01) and from 0.79 to 0.89 (p < 0.01), respectively. Internal consistency was good (Cronbach's α coefficient: 0.93). The correlation with the 8-item scale indicated high criterion validity (r = 0.81) and the scale showed high test-retest reliability (r = 0.74, p < 0.01). The intraclass coefficient and standard error of measurement were 0.74 (95% confidence intervals: 0.71-0.77) and 4.04 (95% confidence intervals: 1.86-6.20), respectively. Correlations with relevant workplace psychosocial factors showed convergent validity.

CONCLUSIONS

The results confirmed that the newly developed WSC scale has adequate psychometric properties.

Positive and negative associations of individual social capital factors with health among community-dwelling older people

AIM

Previous literature has found positive correlations between social capital and health in older adults, fewer studies have investigated the subdimension's effects of social capital on health. We aimed to determine the individual social capital subfactors in community-dwelling older adults in Japan, and to analyze the associations of these factors with physical and mental health.

METHOD

We sent a self-administered questionnaire assessing their perception of social group activity as the individual social capital, and mental and physical health (measured by the Medical Outcomes Study Short Form-36) to 4320 randomly selected older people.

RESULTS

There were 1836 valid responses. We clarified that people who participated in any social activity group were in significantly better physical and mental health compared with the people who did not. By the factor analysis of the perception for the social group activity, we identified three components of the individual social capital aspect that we termed harmonious, hierarchic and diversity. Using multiple linear regression, we found the hierarchic aspect was significantly negatively associated with mental health, whereas the harmonious aspect was significantly positively associated with mental and physical health, and diversity was significantly positively associated with mental health.

CONCLUSION

As the previous research literature on social capital has mainly emphasized its positive health consequences, the present findings provide a novel demonstration that some aspects of individual social capital can have negative associations with health outcomes in community-dwelling older people. For the practical application of promoting a healthier society, it is important to consider both the positive and negative sides of social capital. Geriatr Gerontol Int 2017; 17: 2427-2434.

The Role of Relational Social Capital and Communication in the Relationship Between CSR and Employee Attitudes

This study examines the effects of corporate social responsibility (CSR) on employee attitudes (affective commitment and job satisfaction). Based on a sample of 1,249 employees in 40 firms, collected across multiple time points from multisource data, hierarchical linear modeling was employed to examine the mediating role of relational social capital between CSR and employee attitudes and the moderating role of communication in this relationship. The results indicate that CSR has a positive influence on affective commitment and job satisfaction and that this is fully mediated by relational social capital. However, the moderated mediation effects of communication were insignificant. The results suggest that firms may “do well” by eliciting positive employee attitudes through relational social capital stemming from “doing good.” Implications and directions for future research are discussed.

The bright side and dark side of workplace social capital: opposing effects of gender on overweight among Japanese employees

Background

A growing number of studies have sought to examine the health associations of workplace social capital; however, evidence of associations with overweight is sparse. We examined the association between individual perceptions of workplace social capital and overweight among Japanese male and female employees.

Methodology/Principal Findings

We conducted a cross-sectional survey among full-time employees at a company in Osaka prefecture in February 2012. We used an 8-item measure to assess overall and sub-dimensions of workplace social capital, divided into tertiles. Of 1050 employees, 849 responded, and 750 (624 men and 126 women) could be linked to annual health check-up data in the analysis. Binomial logistic regression models were used to calculate odds ratios and 95% confidence intervals for overweight (body mass index: ≥25 kg/m², calculated from measured weight and height) separately for men and women. The prevalence of overweight was 24.5% among men and 14.3% among women. Among men, low levels of bonding and linking social capital in the workplace were associated with a nearly 2-fold risk of overweight compared to high corresponding dimensions of social capital when adjusted for age, sleep hours, physiological distress, and lifestyle. In contrast, among women we found lower overall and linking social capital to be associated with lower odds for overweight even after covariate adjustment. Subsequently, we used multinomial logistic regression analyses to assess the relationships between a 1 standard deviation (SD) decrease in mean social capital and odds of underweight/overweight relative to normal weight. Among men, a 1-SD decrease in overall, bonding, and linking social capital was significantly associated with higher odds of overweight, but not with underweight. Among women, no significant associations were found for either overweight or underweight.

Conclusions/Significance

We found opposite gender relationships between perceived low linking workplace social capital and overweight among Japanese employees.