Incidence of coronary heart disease among remote workers: a nationwide web-based cohort study.

Coronary heart disease (CHD) risk is influenced by socioeconomic status-related parameters, particularly occupation. We investigated occupational gaps in CHD risk and how the introduction of remote work moderated the observed occupational differences in CHD risk during the coronavirus disease 2019 pandemic in Japan. Data from a web-based, nationwide cohort study, comprising 17,640 workers (aged 20-65 years) with baseline data from December 2020, were analyzed. Participants were grouped by occupation as upper-level nonmanual workers (managers/professionals) and others (reference group). The primary outcome was CHD (angina pectoris/myocardial infarction) onset retrospectively confirmed at the 1-year follow-up survey. Upper-level nonmanual workers exhibited a higher CHD incidence than others (2.3% vs. 1.7%). This association was pronounced in the younger (20-49 years) population, with a significant CHD risk (adjusted risk ratio = 1.88). Upper-level nonmanual workers exhibited nearly 15% higher remote work prevalence, with a significant remote work-related CHD risk (adjusted risk ratio = 1.92). The mediating effects of remote work explained an overall disparity of 32% among the younger population. Occupational gaps in CHD incidence in Japan differ from those in Western countries, where upper-level nonmanual workers have lower cardiovascular risk. In Japan, remote work can mediate CHD risk in the younger population of upper-level nonmanual workers.

Relationship between firm size and perceived organizational support and the moderating role of supervisor support: A Nationwide Cross-sectional Study.

OBJECTIVE: The study aims to explore the relationship between firm size and perceived organizational support (POS) and to investigate how supervisor support might moderate this relationship. METHODS: The study involved a cross-sectional questionnaire survey in Japan with 25,648 participants. Assessing POS through eight-question. Firm size was categorized into small (2-49 employees), medium (50-999), and large (1,000 or more). Coefficients were estimated using multiple regression analyses. RESULTS: The analysis revealed that medium and large firms had lower POS compared to small firms, with the difference being more pronounced in medium firms. A positive interaction between firm size and supervisor support was observed for POS. CONCLUSIONS: This study found that although POS is more likely to be lower in medium and large firms than in small firms, the effect of supervisor support on improving POS is stronger.

Relationship between diabetes treatment status and occupational accidents.

AIMS: To evaluate the relationship between diabetes treatment status and occupational accidents. METHODS: A cross-sectional study was conducted using an online questionnaire survey completed in March 2022 among workers aged 20 years or older. The questionnaire included questions about diabetes treatment status and occupational accidents. The association between the treatment status of diabetes and occupational accidents was examined using a logistic regression analysis. RESULTS: The study included 25,756 participants with no diabetes, 1,364 participants receiving diabetes treatment, 177 participants who had interrupted diabetes treatment, and 396 participants who needed diabetes treatment but had not seen a doctor. Compared with those with diabetes treatment, the odds ratio of occupational accidents among participants without diabetes was 0.40 (95% CI: 0.32-0.49), the odds ratio among participants with interrupted diabetes treatment was 4.15 (95% CI: 2.86-6.01), and the odds ratio among participants who needed diabetes treatment but had not seen a doctor was 1.25 (95% CI: 0.89-1.77). CONCLUSIONS: This study showed that diabetes treatment status was related to occupational accidents, and it may be important for workers with diabetes to be supported to balance their diabetes management and their work commitments.

A prospective cohort study of presenteeism and increased risk of unemployment among Japanese workers during the COVID-19 pandemic.

OBJECTIVES: Presenteeism adversely affects workers' quality of life, leading to further deterioration of their health and affecting their ability to continue working. Unemployment is one of the most serious consequences for workers experiencing presenteeism. A worker's ability to work depends on the degree of mismatch between their health status and job demands and work factors. The COVID-19 pandemic has affected workers' experiences of presenteeism as well as their employment status. We examined the association between presenteeism and risk of job resignations and unemployment among Japanese workers during the COVID-19 pandemic. METHODS: A prospective study of 27 036 internet monitors was conducted, starting in December 2020, with 18 560 (68.7%) participating in the follow-up by December 2021. The Work Functioning Impairment Scale (WFun) was used to measure the degree of work function impairment. RESULTS: The group with the highest WFun scores had higher odds ratios (ORs) for both retirement and unemployment for health reasons than the group with the lowest WFun scores. ORs were 2.99 (95% CI, 2.48-3.62; P < .001) and 1.82 (95% CI, 1.65-2.00; P < .001), respectively. CONCLUSIONS: Workers with work functioning impairment are at increased risk of resignation or unemployment. Management strategies for workers with work functioning impairment are needed to reduce their disadvantages in employment.

Treatment status of psychiatric disorders and falls in the workplace among Japanese workers: a nationwide cross-sectional study.

OBJECTIVES: In Japan, the most common injury requiring sick leave is a fall in the workplace; therefore, it is very important to prevent falls. Most measures to prevent falls involve aspects of the workplace environment and safety. However, few measures consider the perspective of individual health. We investigated the relationship between psychiatric disorders and falls in the workplace and whether treatment status for a psychiatric disorder is associated with workplace falls. METHODS: We conducted a cross-sectional study among workers aged 20 years or older in Japan from February 28 to March 3, 2022. In total, the data of 27 693 participants were analyzed. We used a questionnaire to query participants' status of treatment for any psychiatric disorder and whether they had experienced a fall in the workplace. The association between treatment for a psychiatric disorder and workplace falls was examined using logistic regression analysis. RESULTS: Compared with participants receiving appropriate treatment for a psychiatric disorder, the odds ratio (OR) of a workplace fall was significantly lower among participants who did not require treatment for a psychiatric disorder, at 0.56 (95% CI: 0.47-0.66; P < .001); the OR of a workplace fall was significantly higher among participants whose treatment for a psychiatric disorder was interrupted, at 1.47 (95% CI: 1.21-1.78; P < .001), after adjusting for age, sex, household income, number of workplace employees, sleeping hours, exercise habits, and psychological distress. CONCLUSIONS: Our findings suggest that receiving appropriate treatment for psychiatric disorders may contribute to preventing falls in the workplace.

Association between exposure to technological advances in the workplace and work engagement: a prospective cohort study.

OBJECTIVES: The study objective was to measure the association between exposure to technological advances and work engagement, adjusting for personal and workplace factors. METHODS: We conducted a nationwide online longitudinal survey study in Japan. The sample was stratified to represent Japanese workforce conditions. Work engagement was measured using the Japanese version of the Utrecht Work Engagement Scale-9. Exposure to technological advances was measured using a single question with Likert scale responses. Industry characteristics that were more/less likely to be replaced by automation were also measured. Linear regression was used for statistical analysis. RESULTS: There were 16 629 participants. We found that exposure to technological advances was associated with work engagement after adjustment for age, sex, education, income, and industry characteristics. We observed a significant interaction between age and exposure to technological advances (coefficient 0.891, P < .001), and conducted an age-stratified linear regression analysis. The significant association between age and exposure to technological advances reduced as age increased, and disappeared after adjustment for baseline work engagement. CONCLUSIONS: Longitudinal observations showed that exposure to technological advances was not significantly associated with work engagement.

Effects of the need for support from the workplace and resilience on psychological distress in Japanese employees: a one-year prospective study.

PURPOSE: This study examines workplace support and resilience's influence on psychological distress in Japanese employees. METHOD: A 1-year prospective online cohort study was conducted. Logistic regression analyzed prevalence odds ratios (PORs) and 95% confidence intervals (CIs) for psychological distress. Participants were grouped based on their support and resilience levels. RESULTS: PORs for psychological distress followed this pattern for low and high resilience groups: "necessary but not received" (POR and 95% CI for low/high resilience: 9.71, 6.88-13.69 and 4.72, 2.97-7.52, respectively), "received" (6.65, 4.29-10.29 and 2.27, 1.21-4.25), and "not necessary" (4.43, 3.30-5.95 and reference). Workplace support had a stronger impact on psychological distress in low-resilience employees. CONCLUSIONS: We provided evidence that the combination of the need for support from the workplace and resilience affects psychological distress in employees.

A Cross-sectional Study on the Impact of Unfair Treatment Associated With COVID-19 Infection and Psychological Distress in Japanese Workers.

OBJECTIVE: Psychological distress is commonly reported sequela in COVID-19-infected people. We investigated the association between experiencing COVID-19 infection and psychological distress in Japan. METHOD: A total of 14,901 persons who participated in a follow-up survey in December 2022 were included in the analysis. Odds ratios and regression coefficients were estimated by statistical analysis, with history of COVID-19 infection as the independent variable and presence of psychological distress as the dependent variable. RESULT: Experiencing COVID-19 infection was associated with psychological distress. In a model adjusted for "feeling treated unfairly," the association between infection experience and a high K6 score was significantly attenuated. CONCLUSIONS: The results showed that the experience of COVID-19 infection is associated with psychological distress. Moreover, most cases of psychological distress among those who experienced COVID-19 infection can be at least partly explained by a perception of unfair treatment.

Protocol of a study to benchmark occupational health and safety in Japan: W2S-Ohpm study.

We aim to conduct a prospective cohort study to benchmark occupational health and safety in Japan. Here, we describe the detailed protocol for the baseline survey based on the Checklist for Reporting Results of Internet E-Surveys. We conducted the baseline survey for the prospective cohort study in 2022. Our target population was workers in Japan aged 20 years or older, who we sampled to be representative of the Japanese workforce, stratified by sex, age, and region. Among 59,272 registered monitors who answered the initial screening questions, 29,997 completed the survey. After excluding 2,304 invalid responses, we used 27,693 valid participants in our final analysis. The number and mean age of men were 15,201 (55%) and 46 years; those of women were 12,492 (45%) and 45 years. With respect to sex, age, and regional composition, our sampling was representative of Japan's working population. Our sampling for employment status and industry yielded almost the same proportions as a government-led representative sampling of workers in Japan.

The Japanese version of the occupational future time perspective scale: A validation study.

OBJECTIVE: This study aimed to develop and validate a Japanese version of the Occupational Future Time Perspective scale (OFTP-J) and assess its structural validity, construct validity, internal consistency, and test-retest reliability among Japanese workers. METHODS: The online survey was conducted with 2046 participants who met the eligibility criteria. The Japanese version of the OFTP scale was developed through translation and back-translation processes. Confirmatory factor analysis was performed to evaluate the structural validity. Pearson's correlations were computed to assess construct validity, and Cronbach's alpha coefficients were calculated to determine internal consistency. Test-retest reliability was examined using Cohen's weighted kappa coefficients and intraclass correlation coefficients. RESULTS: The confirmatory factor analysis supported an 8-item model with three factors (i.e., focus on opportunities, perceived remaining time, and focus on limitations) for the Japanese version of the OFTP scale. The scale demonstrated high internal consistency, with Cronbach's alpha coefficients ranging from 0.81 to 0.92. Construct validity was supported by significant correlations between the OFTP scale and its subscales, possible antecedents (age, self-rated health, and job control), and possible outcomes (learning goal orientation, job crafting, and work engagement). Test-retest reliability was confirmed with moderate agreement. CONCLUSIONS: The OFTP-J was found to be reliable and valid. It can be used to measure OFTP among Japanese workers and facilitate comparative research with the original English version. The OFTP-J provides valuable insights into the learning motivation and work engagement of the aging workforce.

Inequality in workplace support for various types of precarious workers compared with permanent workers in Japan: A cross-sectional study.

OBJECTIVES: The purpose of this study was to examine, by sex, whether precarious workers in Japan receive less support in the workplace than permanent workers. METHODS: We conducted a cross-sectional study using an online questionnaire in 2022. We stratified participants by sex and performed modified Poisson regression analysis. The outcomes were support from supervisors, co-workers, occupational health professionals, and no one. Adjusted prevalence ratios (aPR) were calculated for contract workers, part-time workers, and dispatched workers, using permanent workers as reference. RESULTS: This study had 21 047 participants. For men, 87.9% were permanent workers; for women, 50.7% were permanent workers and 37.3% were part-time workers. For workplace support, 47.5% of men and 45.2% of women selected superiors; 41.8% of men and 50.5% of women selected colleagues; 16.8% of men and 6.2% of women selected occupational health professionals. Female contract workers were less likely to receive support from their supervisors (aPR 0.88) or co-workers (aPR 0.89). Male part-time workers were less likely to be supported by their co-workers (aPR 0.86). Dispatched workers were less likely to be supported by their supervisors (men aPR 0.71, women aPR 0.84) and co-workers (men aPR 0.73, women aPR 0.77). Part-time and dispatched workers were less likely to receive support from occupational health professionals. CONCLUSIONS: Precarious workers could get less workplace support than permanent workers. This may contribute to occupational health problems with precarious workers.

Workplace Measures Against COVID-19 and Mistreatment in the Workplace Among Japanese Employees: A 1-Year Prospective Cohort Study.

OBJECTIVE: The purpose of this study was to identify the COVID-19 infection prevention measures that are at risk of being perceived by employees as mistreatment in the workplace. METHODS: This study included full-time workers who enrolled as subjects in a nationwide prospective cohort study. Baseline surveys performed during the pandemic were used to identify the workplace measures against COVID-19. A tracing survey was conducted 1 year later to assess workplace mistreatment. RESULTS: Of the 18,170 participants, 276 judged that they had experienced mistreatment by the measures. "Enforcing daily temperature measurement" and "stopping business trips" were associated with mistreatment. Meanwhile, "requesting that employees refrain from going to work when ill" and "restricting work-related social gatherings and entertainment" had the potential to reduce workplace mistreatment. CONCLUSIONS: Certain measures against COVID-19 can reduce or increase the burden on employees.

Seeking Treatment Profile of Male Shift Workers With Hypertension and Diabetes.

OBJECTIVE: This study was identified seeking treatment for hypertension and diabetes among male shift workers. METHOD: This retrospective cohort study included nine large companies in Japan. Data were collected from health checkup, health insurance records, and self-administered questionnaires in 2017 and 2020. Data were analyzed using Kaplan-Meier curves and Cox regression. RESULT: Person-days shift workers and day workers seeking treatment for hypertension were 41,604 and 327,301, respectively and, for diabetes, were 7326 and 60,735, respectively. The log ranks were statistically significant. Shift workers were 46% and 56% less likely to seek treatment for hypertension and diabetes, respectively, than day workers were after adjustment for age, marital status, education level, and intention to modify lifestyle (model 2) ( P < 0.01). CONCLUSIONS: Male shift workers are less likely to seek treatment for hypertension and diabetes compared with day workers.

Evaluation of workplace infection prevention and control measures for COVID-19: A prospective cohort study in Japan.

Background: Encouraging the implementation of infection prevention and control (IPC) measures has been necessary to prevent workplace infections caused by the coronavirus disease 2019 (COVID-19). However, the effectiveness of these measures in reducing infections has not been thoroughly evaluated. We evaluated employees' COVID-19 infection rates in relation to the implementation of IPC measures at their workplaces to identify effective workplace measures. Methods: This prospective cohort study was conducted between December 2020 and December 2021 using Internet-based self-assessment questionnaires, with 11,982 participants included from the baseline. To estimate whether implementing workplace IPC measures was associated with COVID-19 incidence rates among participants, we estimated multivariate-adjusted relative risk (RR) using a log-binomial model. Results: After adjusting for sex, age, education, household members, occupation-related factors, and personal preventive behaviors, requesting ill employees to refrain from going to work showed significantly lower COVID-19 infection rates than not requesting it (RR: 0.56, 95% CI: 0.34-0.91, p = 0.019). Conclusions: Employees restricted from reporting to work when ill had significantly lower COVID-19 infection rates than those who did not follow this measure. The results indicated that not coming to work when ill was effective in reducing COVID-19 infections at the workplace. We suggest that companies proactively adopt this policy and encourage their employees to comply with it.

Workplace Social Support and Work Engagement Among Japanese Workers: A Nationwide Cross-sectional Study.

OBJECTIVES: We investigated the relationship between employees' perceptions of the number of sources of workplace social support and work engagement and whether each type of workplace social support is independently related to work engagement. METHODS: A cross-sectional study was conducted using a questionnaire survey in Japan. In total, 12,017 participants were analyzed. Participants were asked about 4 sources of workplace social support: supervisors, colleagues/subordinates, occupational health staff, and external counselors contracted by the workplace. Work engagement was measured using the 9-item Utrecht Work Engagement Scale. Coefficients were estimated using multiple regression analyses. RESULTS: The coefficient of work engagement increased as the number of sources of perceived workplace social support increased. Each support was also positively related to work engagement. CONCLUSIONS: Organizations should develop systems comprising various sources of workplace social support to increase employee work engagement.

Supervisors' Work Engagement Is Associated With Interactivity and Carefulness in Supporting Subordinates: A Cross-sectional Study Using Text Mining in Japan.

OBJECTIVE: This study aimed to structure supervisory support and clarify the relationship between supervisors' work engagement and support for their subordinates. METHODS: We conducted a cross-sectional study in a manufacturing company using a questionnaire survey. Supervisors provided open-ended responses regarding the provision of support for their subordinates. Using text mining, we structured these descriptions into multiple categories, assigned words to them, and analyzed frequently mentioned categories by the level of work engagement. RESULTS: We obtained responses from 729 participants that included 13,968 words. We structured supervisory support by three categories (contents, direction, and attitude toward support) and 11 subcategories. As supervisors' work engagement increased, the rates of mentioning information retrieval, information transmission, and carefulness increased. CONCLUSIONS: Supervisors with work engagement could communicate with each other and be careful in providing support to their subordinates.

Workplace infection control measures and romantic activities of workers during COVID-19 pandemic: A prospective cohort study in Japan.

Objective: Due to the COVID-19 pandemic, non-married people are at high risk of loneliness. With social interactions restricted, it is important for non-married people to acquire a new romantic partner for their mental health and quality of life. We hypothesized that infection control efforts in the workplace influence people's social interactions, including romantic activities. Methods: We conducted an internet-based prospective cohort study from December 2020 (baseline) to December 2021, using self-administered questionnaires. Briefly, 27,036 workers completed the questionnaires at baseline, and when followed up after 1 year, 18,560 (68.7%) participated. A total of 6,486 non-married individuals with no romantic relationship at baseline were included in the analysis. At baseline they were asked about the implementation of infection control measures in the workplace, and at follow-up they were asked about activities they performed with a view to romantic relationships during the period from baseline to follow-up. Results: Compared to workers in workplaces with no infection control measures, the odds ratio (OR) associated with romance-related activities for those in workplaces with seven or more infection control measures was 1.90 (95% CI: 1.45-2.48, p < 0.001), and the OR associated with having a new romantic partner was 1.79 (95% CI: 1.20-2.66, p = 0.004). Discussion: Under the COVID-19 pandemic, the implementation of infection control measures in the workplace and the expressed satisfaction with those measures promoted romantic relationships among non-married, single individuals.

Health and Work Performance Consequences of Working From Home Environment: A Nationwide Prospective Cohort Study in Japan.

OBJECTIVES: The physical work environment while working from home (WFH) is a key component of WFH, which, if inadequate, can impair workers' health and work functioning. We investigated environmental factors in WFH and worsening of work functioning. METHODS: A 1-year prospective cohort study was conducted involving 2530 Japanese workers who worked from home. Environment while WFH was assessed using binary subjective assessments based on existing guidelines. Existence of impaired work function was assessed using the Work Functioning Impairment Scale. We performed multilevel logistic regression analysis nested in the prefecture of residence. RESULTS: Lack of room/space for concentration, lack of enough light and foot space, inadequate temperature and humidity, and use of a sitting table were associated with work functioning impairment. CONCLUSIONS: An inappropriate environment while WFH can have a negative impact on workers' health.

Personal infection prevention behaviors and campaign to encourage travel during COVID-19: A cross-sectional study.

Introduction: The Go To Travel campaign in Japan was launched to subsidize travel and accommodation costs for tourists through vouchers that could be used at domestic destinations. Infection prevention behavior can lead to refraining from travel owing to infection concerns; conversely, taking preventive action can promote travel. There is a lack of information about the association between infection prevention behaviors and desire to travel. During a pandemic of infection, there is the difficult challenge of balancing the promotion of infection prevention behavior with economic revitalization. Thus, we examined the relationship between personal infection prevention behaviors and using Go To Travel. Methods: We conducted a cross-sectional study of 26,637 workers who responded to a large-scale questionnaire survey about COVID-19 in Japan. We built multilevel logistic regression models adjusted for confounders to assess the association between each personal infection prevention behavior and using Go To Travel. We analyzed the seven infection prevention behavior individually: wearing a mask when among other people; disinfecting hands with alcohol before going indoors; washing hands after using the toilet; gargling upon returning home; opening a window to ventilate a room; carrying an alcohol sanitizer; and disinfecting hands after touching objects outside. Results: Among the 26,637 participants, 7,959 (30%) used Go To Travel. For "wearing a mask in the presence of others" and "washing hands after using the toilet," the majority of respondents answered "almost always: 86.5 and 85.6% respectively. Action "carrying alcohol disinfectant" was the least implemented, with 36.9% of respondents saying "almost never." Two of the seven preventive behaviors ("disinfecting hands with alcohol before going indoors" and "carrying alcohol disinfectant") were positively related to using Go To Travel, that is, the more of these actions they took, the more they used Go To Travel (p for trend <0.001). Conclusions: To balance pandemic preparedness with economic preparedness, it is also necessary to promote travel when the infection situation is calm. However, since human mobility can be a factor that exacerbates the infection situation, it is necessary to promote more infection prevention behaviors among individuals. We confirmed that Go To Travel users were basically doing a good infection prevention behaviors, but they tended not to wash their hands after touching things or carry alcohol sanitizer. It is necessary to encourage these measures to be taken when traveling.

The effects of telecommuting and family cohabiting situation on psychological distress in Japanese workers during the COVID-19 pandemic: A cross-sectional study.

OBJECTIVE: This study aimed to determine whether telecommuting's impact on psychological distress differed depending on the status of workers' cohabiting family members during the COVID-19 pandemic. METHODS: We collected data from 33 302 workers in Japan through an Internet survey, and included 27 036 valid responses in the analysis. The survey included items on family cohabitation and telecommuting status during the COVID-19 pandemic. We assessed workers' psychological distress using the Kessler 6. RESULTS: The psychological distress odds ratios (ORs) were higher for participants who lived with family members requiring care (OR = 1.38, P < .001), and lower for participants living with preschool children (OR = 0.77, P < .001) or a spouse (OR = 0.80, P < .001). Furthermore, odds ratios were higher for participants who worked from home and lived with family members requiring care or preschool children (OR = 1.52, P = .002; OR = 1.28, P = .028). Stratified by the presence or absence of family members living with them, psychological distress was higher for telecommuters with family members requiring care, preschool children, or elementary school children. CONCLUSION: The association between telecommuting and psychological distress varies, depending on workers' living situation with family members.