Middle-aged Workers Research Articles

Assessment of healthy worker survivor bias among middle-aged manufacturing employees in Korea

Abstract Background Healthy Worker Survivor Bias (HWSB) describes a selection bias where those continuously employed tend to exhibit superior health outcomes compared to their unemployed counterparts. This bias challenges for adjustments due to its time-dependent nature. This study aims to evaluate the extent of HWSB related to changes in employment status among middle-aged manufacturing workers using comprehensive national data from Korea. Methods The study analyzed data from the National Health Insurance Service, targeting individuals aged 40-49 who maintained consistent insurance coverage-either as manufacturing employees or non-employees (self-employed or unemployed)-from 2008 to 2010. The observation period spanned from January 2011 to December 2022, with all-cause mortality as the primary outcome. We employed landmark analysis to quantify HWSB related to employment status by comparing age-standardized mortality ratios between employees and the general population from the initial assessment to the last landmark period (up to 7 years), calculating 95% confidence intervals (CI) using Poisson distribution. Results The cohort included 4,621,983 participants (726,616 manufacturing employees and 3,895,367 (84.3%) non-employees). Throughout an average follow-up of 10.9 years (43.1% male; median age of 44), there were 116,418 deaths (11,530 (1.6%) among manufacturing employees and 104,888 (2.7%) among non-employees). Analysis revealed a consistent linear increase in HWSB over time. Notably, the bias was more pronounced among females (7-year HWSB-ES [95% CI]: 0.27 [0.17-0.37]) compared to males (7-year HWSB-ES [95% CI]: 0.18 [0.14-0.22]). Conclusions This study quantifies the extent of HWSB among middle-aged manufacturing workers in Korea, highlighting its significant impact, notably in females. These findings are vital for occupational health research, emphasizing the necessity to consider HWSB to prevent the underestimation of health risks associated with hazardous exposures. Key messages • Findings suggest HWSB is more pronounced in female manufacturing workers, indicating the need for targeted occupational health interventions. • The study underscores the importance of accounting for HWSB in occupational health studies to avoid underestimating health risks associated with workplace exposures.

Impact of Delay of Retirement Age on Middle Age Employment Rate

Abstract: This paper examines the implications of delaying retirement on the labor market in China, focusing on its impact on the employment rates across different age groups. Over the past several decades, demographic shifts, such as the aging population and extended education durations, have necessitated adjustments to retirement policies. These adjustments pose significant questions about the optimal retirement age and the consequent effects on the labor market. Utilizing a combination of theoretical frameworks and empirical data, this study explores the correlation between delayed retirement and employment rates among middle-aged and older workers. The findings suggest a significant and positive correlation between these groups, indicating that a delayed retirement age could enhance employment opportunities for middle-aged individuals without adversely affecting the younger workforce. The study engages with data from the 2020 census in China and employs Ordinary Least Squares (OLS) regression models to analyze the relationship between age groups and employment rates. The results show a nuanced impact of delayed retirement on the labor market, with implications for policy-making. Specifically, the paper addresses the potential benefits of a flexible retirement age policy, considering economic, demographic, and social factors.

Analysis of factors affecting health status and abnormal lung function of workers exposed to welding fumes in Tianjin from 2020 to 2022

Objective: To investigate the health status and the influencing factors of abnormal lung function of welding fumes exposure workers in Tianjin from 2020 to 2022, and to provide theoretical basis for the protection and intervention of key occupational diseases. Methods: In October 2023, the relevant data of occupational health examination of welding fumes exposure workers in Tianjin from 2020 to 2022 (10831, 10758 and 21717 in 2020, 2021 and 2022, respectively) were collected from the China Disease Prevention and Control Information Platform. The electrocardiogram, chest radiograph and lung function abnormalities of workers in each year were analyzed, as well as the association between lung function abnormalities and gender, age, working age, region, etc. With gender, age and years of service as independent variables, logistic regression analysis was performed year by year on the influencing factors of abnormal lung function. Results: From 2020 to 2022, electrocardiogram, chest radiograph and lung function abnormality rates of workers exposed to welding fumes had statistical significances (χ(2)=301.79, 7.87, 1614.54, P<0.05), and the lung function abnormality rate showed a downward trend year by year (χ(2)(trend)=1516.19, P<0.001). The abnormal rates of lung function in male workers exposed to welding fumes were higher than those in female workers (χ(2)=61.65, 8.04, 15.22, P<0.05). With the increase of age, the abnormal rate of lung function showed an increasing trend (χ(2)(trend)=6.47, 10.81, 4.72, P<0.05). The abnormal rates of lung function in the four districts around the city in each year were 22.05% (318/1442), 8.91% (171/1919) and 6.48% (273/4212), respectively. Year by year logistic regression analysis showed that females were the protective factors for abnormal lung function (OR=0.369, 0.568, 0.546; 95%CI: 0.298-0.458, 0.367-0.879, 0.388-0.767; P<0.05) . Conclusion: Attention should be paid to the health status of welding fumes workers in Tianjin, focusing on the protection of middle-aged male workers, and effective prevention measures should be taken for key areas and industries such as the four districts around the city.

Research on the Effect of the Healthy Cities Pilot Policy on the Labor Supply Time of Middle-Aged and Elderly Workers in China

Against the backdrop of Healthy China and an aging population, there is an urgent need to explore the effect of the Healthy Cities Pilot Policy (HCPP) on residents’ labor supply. This study integrates the HCPP, residents’ health, and labor supply time into a unified analytical framework. Using data from the China Health and Retirement Longitudinal Study (CHARLS) spanning the period 2011–2020 and leveraging the quasi-natural experiment provided by China’s 2016 HCPP, we empirically investigate its effects on labor supply time among middle-aged and elderly workers. Our findings indicate: (1) HCPP increases average weekly working hours by 2.834 h in pilot cities. (2) HCPP significantly enhances residents’ health status in pilot cities, extending their healthy time. (3) Middle-aged and elderly workers allocate more of their extended healthy time to labor rather than leisure, potentially influenced by traditional Chinese perceptions of “ceaseless toil”. (4) The impact of HCPP on labor supply time exhibits group heterogeneity, with stronger promotion effects observed among vulnerable middle-aged and elderly groups characterized by older age, rural household registration, lower educational attainment, and lower income levels. This research offers insights for policymakers aiming to optimize health policies and promote sustainable development within Chinese society.

Differential associations of physical job demands with cognitive impairment in Korean workers aged 45 and older: a 14-year longitudinal study using the Korean Longitudinal Study of Aging (KLoSA)

ObjectivesTo investigate the association between subelements of physical job demands and cognitive impairment risk in middle-aged and older workers in Korea.DesignLongitudinal study using eight waves (2006–2020) of the Korean Longitudinal...

Factors associated with acquiring exercise habits through health guidance for metabolic syndrome among middle-aged Japanese workers: A machine learning approach

ObjectivePhysical inactivity increases the risk of mortality and chronic morbidity. Therefore, it is crucial to establish strategies to encourage individuals to increase their physical activity and develop exercise habits. The objective of this study was to explore factors associated with acquiring exercise habits using machine learning algorithms. MethodsThe analyzed dataset was obtained from the Specific Health Guidance for metabolic syndrome systematically implemented by the Japanese Ministry of Health, Labor, and Welfare. We selected target individuals for health guidance without exercise habits in 2017 and assessed whether the participants acquired exercise habits through health guidance in 2018. We applied ten machine learning algorithms to build prediction models for acquiring exercise habits. ResultsThis study included 16,471 middle-aged Japanese workers (age, 49.5 ± 6.2 years). Among the machine learning algorithms, the Boosted Generalized Linear Model was the best for predicting the acquisition of exercise habits based on the receiver operating characteristic curve on the test set (ROC-AUCtest, 0.68). According to the analyses, the following factors were associated with the acquisition of exercise habits: being in the maintenance or action stage of changing exercise and eating behaviors based on the transtheoretical model; regular physical activity or walking; normal high-density lipoprotein cholesterol; and high alcohol consumption. ConclusionsOur findings can be used to establish an efficient strategy for encouraging individuals to acquire exercise habits through Specific Health Guidance or other health guidance. However, the lower ROC-AUCtest suggests that additional variables are necessary to enhance the prediction model.

Leveraging AdaNet for In-Depth Analysis of Hypertension Medication Adherence in 1,512 Middle-Aged Male Korean Workers

Leveraging AdaNet for In-Depth Analysis of Hypertension Medication Adherence in 1,512 Middle-Aged Male Korean Workers

Interactions of depression, anxiety, and sleep quality with menopausal symptoms on job satisfaction among middle-aged health workers in England: a STROBE-based analysis

BackgroundThis study examined the association between menopausal symptoms and job satisfaction, and ascertained whether three psychosomatic factors (e.g., anxiety, depression, and sleep quality) interact with menopausal symptoms on job satisfaction.MethodsA cross-sectional design with sensitivity analysis was adopted. The participants of the study were clinical health workers in England. Data from 154 health workers were analyzed with the hierarchical linear regression (HLR) analysis.ResultsThere was a negative association between menopausal symptoms and job satisfaction (β = −0.38; t = −4.81, p < 0.001), but this relationship became non-significant after adjusting for work stress, self-reported health, job tenure, and resilience at work. An interaction between menopausal symptoms and the psychosomatic factors was found. The strength of the negative association between menopausal symptoms and job satisfaction was weakened by sleep quality (β = 0.05; t = 0.48; p > 0.05) but was strengthened by anxiety (β = −0.22; t = −2.28; p < 0.05) and depression (β = −0.24; t = −2.16; p < 0.05).ConclusionMenopausal symptoms can be directly associated with lower job satisfaction and indirectly associated with lower job satisfaction through its interaction with depression and anxiety. Menopausal symptoms can weaken the positive association between sleep quality and job satisfaction.

Association and interaction effect of shift work and the risk for obstructive sleep apnea on diabetes mellitus in middle-aged Korean workers.

To investigate the association of shift work and the risk for obstructive sleep apnea (OSA) with diabetes mellitus (DM), and the interaction effect of shift work and the risk for OSA on DM. Data from the Korea National Health and Nutrition Examination Survey (KNHANES) 2019-2021 were used. The participants were 3012 employees aged 40 to 59 years. Shift work was assessed using self-reporting questionnaires. The risk for OSA was assessed by STOP-BANG score. The distribution of demographic factors was calculated using the chi-square test. Adjusted odds ratios (AORs) and 95% confidence intervals (CIs) were calculated using multivariable logistic regression. An interaction effect between shift work and the risk for OSA on DM was evaluated using relative excess risk owing to interaction (RERI) and attributable proportion (AP) with 95% CIs. The synergic index (SI) was also calculated. Shift work and the risk for OSA were each significantly associated with DM. There was also a significant interaction effect between shift work and the risk for OSA on DM. The RERI was 0.543 (95% CI 0.205-1.361) and the AP was 0.230 (95% CI 0.145-0.342). The SI was 1.662 (95% CI 1.481-1.843). There was an association and a significant interaction effect of shift work and the risk for OSA on DM. The management of OSA in shift workers should be implemented to prevent DM.

Nonrestorative Sleep and Type 2 Diabetes Incidence: The Aichi Workers' Cohort Study.

The term "nonrestorative sleep (NRS)" refers to an unrefreshed feeling at wake-up and is a domain of poor sleep quality. Previous research has demonstrated that NRS is linked to a number of diseases and adverse health outcomes, but less is known regarding the link between NRS and diabetes, particularly in Japanese. We studied 3,665 middle-aged male participants of the Aichi Workers' Cohort Study who were followed-up from 2002 through 2019. Cox proportional hazards models estimated hazard ratios (HRs) and 95% confidence intervals (CIs) of incident type 2 diabetes mellitus (T2DM) in relation to NRS adjusted for potential confounding variables. During a median follow-up of 14.6 years, 421 type 2 diabetes cases were identified. Participants with NRS had a higher crude incidence rate of T2DM (11.2/1,000 person-years), compared to participants without NRS (9.3/1,000 person-years). In the fully adjusted model, individuals who reported having NRS had a significantly higher risk of developing T2DM (HR1.36; 95% CI, 1.10-1.67). The association was observed only in participants under 50 years old (HR 1.82; 95% CI, 1.36-2.43), not in the older (50 years or older) participants (P for interaction = 0.025). In contrast, stratified analyses by the presence of shift work, obesity, or sleep duration showed similar associations in all the strata. NRS was associated with higher risk of T2DM in middle-aged Japanese male workers independent of a variety of lifestyle factors and other sleep problems.

Germ aversion is a risk factor for chronic low back pain and shoulder pain under the COVID-19 pandemic: an internet-based panel study

The COVID-19 pandemic has increased germ aversion, an aversive affective response to a high likelihood of pathogen transmission. While psychological factors are associated with chronic pain, the relationship between germ aversion and chronic pain remains unexplored. This study aimed to examine the relationship between germ aversion and new-onset and prognosis of chronic pain using longitudinal data collected during the COVID-19 pandemic. We conducted web-based surveys of full-time workers at baseline and after three months. Data were collected on demographic characteristics, psychological factors, and chronic pain. Germ aversion was assessed using a modified Perceived Vulnerability to Disease scale. We analyzed responses from 1265 panelists who completed the survey twice. The prevalence of chronic low back pain (CLBP) and chronic neck and shoulder pain (CNSP) was associated with sex, short sleep duration, psychological distress, loneliness, and germ aversion. Stratified analyses showed that germ aversion was a risk factor for CLBP at three months in both individuals with and without CLBP at baseline, and for CNSP at three months in those with CNSP at baseline, even after adjustment for confounders. In conclusion, this preliminary study suggests that high germ aversion is a risk factor for CLBP and CNSP in young and middle-aged workers.

Heat-related illness among workers in British Columbia, Canada: Extreme hot weather in 2021 compared to 2001-2020.

British Columbia (BC), Canada, experienced an unprecedented summer with record-breaking high temperatures in 2021. Yet the health impact has not been examined in occupational settings. This study aimed to characterize occupational heat-related illness (HRI) among BC workers estimated by incidence rates and associations between heatwaves and HRI, compare risks from 2021 and prior summers of 2001-2020, and assess differential impacts on worker groups by demographics and occupations. We identified HRI from workers' compensation claims that occurred between June and August from 2001-2021 in BC. Incidence rates were calculated using working population estimates from Statistics Canada's Labour Force Survey. A time-stratified case-crossover design with conditional Poisson regression was used to examine the impact of heatwaves on occupational HRI. All analyses were stratified by year (2021 versus 2001-2020), age, sex, and occupation. Of the 521 claims identified, 107 (21%) occurred in 2021. Incidence rates for 2021 and prior summers were 3.97 [95% confidence interval (CI) 3.26-4.80] and 0.93 (95% CI 0.85-1.03) claims per 100 000 workers, respectively. This difference represents a 327% increase. Rates were higher in health occupations in 2021 versus 2001-2020. During 2001-2021, the risk of HRI during heatwave days was 4.33 (95% CI 2.98-6.27) times that during non-heatwave days, and the risk was higher among middle-aged workers and workers in trades, transport, and equipment operations. The 2021 heatwaves had greater impact on younger and female workers than those from prior summers. Heat is a crucial workplace hazard. Prevention strategies should prioritize at-risk workers and not be limited to heatwaves.

The Role of Religiousness on Authentic Happiness Through the Mediator of Optimism Among Middle-Aged Female Sanitation Workers

The Role of Religiousness on Authentic Happiness Through the Mediator of Optimism Among Middle-Aged Female Sanitation Workers

Relationship Between Low Visual Acuity and Nonfatal Occupational Same-Level Falls in Japanese Female Employees: A Cohort Study.

The incidence of work-related falls on the same level is increasing, particularly among middle-aged and older female workers. Vision is an important risk factor of falls. We investigated whether objectively measured visual acuity was associated with the incidence of falls. This cohort study included 7317 female employees aged 20-69 in Japanese supermarket stores. Monocular acuity measured during health checkups was classified into three levels (≥0.7, 0.3-0.7, <0.3). Incidence rate ratios of work-related falls within 1 year were estimated. Incidence rate ratios were 1.26 (95%CI: 0.92-1.72) in the 0.3-0.7 group and 2.27 (95%CI: 1.15-4.48) in the <0.3 group. Risk of work-related fall was higher in those with low visual acuity. Vision correction may contribute to fall prevention in workplaces.

중년 남성 직장인의 경력정체가 심리적 안녕감에 미치는 영향

Objectives The purposes of this study were to specify variables related to convergence competency, and to analyze the structural relationships among them.The purpose of this study was to understand career plateau of middle-aged male office workers in korean society and to secure the theoretical background for psychological well-being. Methods For this research, an online survey using Google Form was conducted on 397 male office workers aged 40 to 60 in Korea from DEC. 21 to 31 in 2023, and 382 data were used in the study. Descriptive statistics and correlation analysis of Career Plateau, Self-Efficacy, Meaning in Life, and Ppsychological Well-being were conducted through SPSS 25.0 program, and a structural equation model was performed using the AMOS 18.0. Results The research results are as follows. First, in korean aging era, many middle-aged Korean male office workers are experiencing career plateau. Second, career plateau shows a significant negative correlations with self-efficacy, Meaning in Life, and psychological well-being. Third, it failed to prove the direct effect between career plateau and psychological well-being. Forth, it was confirmed that career plateau affects psychological well-being through direct or indirect mediation of self-efficacy and Meaning in Life. Conclusions In order to improve Psychological Well-being of middle-aged male office workers and minimize the negative effects from Career Plateau, this research suggests that additional effects can be obtained by enhancing Self-Efficacy that has a positive effect directly or indirectly and strengthening Meaning in Life that helps indirectly.

Changes in Metabolic and Inflammatory Markers after a Combined Exercise Program in Workers: A Randomized Controlled Trial.

We investigated the effects of a 16-week combined exercise training on body composition, metabolic and inflammatory markers in sedentary middle-aged workers. We also assessed whether significant alterations in metabolic markers were associated with changes in health-related outcomes. This randomized controlled trial involved 46 participants randomly allocated into control and exercise groups. The exercise group performed 16-week combined aerobic and resistance training for 75 min/session, 3 times/week. Fasting blood samples were collected at baseline and after 16-week intervention to determine lipid profile, metabolic and inflammatory markers as primary outcomes. A total of 36 participants completed the intervention (53.70 ± 6.92 years old) (n = 18 in each group). Waist circumference (interaction effect: F = 7.423, p = 0.002), fat mass (interaction effect: F = 5.070, p = 0.011), and muscle mass (interaction effect: F = 5.420, p = 0.007) were improved in the exercise group compared to the control group. Fasting glucose increased after the 16-week follow-up (time effect: F = 73.253, p < 0.001), without an intergroup difference. Insulin levels were greater in the control compared to exercise group (group effect: F = 6.509, p = 0.015). The control group tended to increase the HOMA-IR index (interaction effect: F = 3.493, p = 0.070) and to decrease the QUICKI index (interaction effect: F = 3.364, p = 0.075) to a greater extent compared to the exercise group. Exercise group reduced leptin (interaction effect: F = 11.175, p = 0.002) and adiponectin (interaction effect: F = 4.437, p = 0.043) concentrations in a greater magnitude than control group. IL-6 (time effect: F = 17.767, p < 0.001) and TNF-α (time effect: F = 9.781, p = 0.004) concentrations decreased after the intervention, without an intergroup difference. IL-17A levels increased in the control compared to exercise group (interaction effect: F = 5.010, p = 0.033). Effects on adiponectin, IL-6 and IL-17A levels seem to depend on baseline BMI, age, and sex. Percentage changes in leptin correlated positively with changes in HOMA-IR index in the exercise (r = 0.565, p = 0.015) and control (r = 0.670, p = 0.002) groups. A combined training program can be an effective strategy to improve body composition and inflammatory markers and prevent marked reductions in insulin sensitivity among middle-aged workers.

Interaction between old age and precarious employment on poor mental well-being in workers: Evidence from a nationally representative sample in Korea.

This study examined the relationship between precarious employment (PE) and mental well-being, focusing on age-specific interactions. Nationally representative Korean workers (N=29,961) were surveyed between 2020 and 2021 to collect data on multidimensional PE (categorized as low, moderate, or high) and the WHO-5 well-being index. Workers' ages were classified as young (<35years), middle-aged (35-54years), and older (≥55years). Logistic regression was performed to estimate the odds ratios (ORs) and 95% confidence intervals (CIs). The interaction between PE and age on well-being was examined by including interaction terms in the regression models. The prevalence of poor well-being was 25%, 29%, and 39% for low, moderate, and high precariousness, respectively, whereas it was 26%, 30%, and 39% for young, middle-aged, and older workers, respectively. In the overall sample, the OR (95% CI) of the association between PE and poor well-being was 1.24 (1.17-1.32) for moderate and 1.54 (1.43-1.65) for high precariousness, compared with low precariousness. There was a significant interaction between old age and PE on the odds of poor well-being. Compared with young workers with low PE, middle-aged workers with high PE (OR: 1.85, 95% CI: 1.62-2.10) and older workers with high PE (OR: 2.10, 95% CI: 1.83-2.40) exhibited increased odds of having poor mental well-being. PE serves as a social determinant of older workers' psychological well-being. Policy interventions are required to protect older workers' psychological well-being.

Temporary Employment Is Associated with Poor Dietary Quality in Middle-Aged Workers in Korea: A Nationwide Study Based on the Korean Healthy Eating Index, 2013-2021.

Temporary employment is associated with an elevated risk of cardiovascular diseases and mortality. This study explored the association between temporary employment and dietary quality in middle-aged workers. This cross-sectional study included a nationwide sample of middle-aged Korean workers (n = 6467). Employment type was categorized into regular, fixed-term, and daily employment, based on labor contract duration. Dietary quality was assessed using the Korean Health Eating Index (KHEI), which ranges from 0 to 100, with higher scores indicating superior dietary quality. Linear regression was used to estimate beta coefficients (β) and 95% confidence intervals (CI). The survey-weighted proportion of regular, fixed-term, and daily employment was 79.0%, 14.2%, and 6.8%, respectively. Fixed-term and daily employment were associated with a reduced KHEI compared with regular employment (β [95% CI]: -1.07 [-2.11, -0.04] for fixed-term and -2.46 [-3.89, -1.03] for daily employment). In sex-stratified analysis, the association between temporary employment and dietary quality was more pronounced in men (β [95% CI]: -1.69 [-3.71, 0.33] for fixed-term and -2.60 [-4.63, -0.53] for daily employment than in women. In conclusion, this study suggests that temporary employment is a social determinant of dietary quality in middle-aged workers.

The Development and Validation of a Scale to Understand Smoking Cessation Efforts Among Middle-Aged Male Workers

The purpose of this study was to develop and test the reliability and validity of a scale assessing the efforts made by midlife adult male smokers to quit smoking. The draft of the scale, designated the Smoking Cessation Assessment of Progress Scale (SCAPS), was developed a qualitative inductive analysis of the characteristics of successful smoking cessation efforts among midlife adult male workers in a previous study by the authors. The subjects were men in their 30s and 40s who were employed, had quit smoking for at least six months, and who had succeeded in quitting without seeking outpatient smoking cessation treatment. After a preliminary survey, the main survey was conducted. Data was analyzed using the maximum likelihood Promax rotation method. Confirmatory factor analysis was subsequently conducted, resulting in the identification of three factors and 17 items. The factors identified were &amp;quot;response to smoking cravings,&amp;quot; &amp;quot;perceived benefits associated with successful smoking cessation,&amp;quot; and &amp;quot;positive perception of smoking cessation. Cronbach&amp;apos;s alpha coefficients for each subscale ranged from 0.702 to 0.873, which were generally favorable. Construct validity was generally ensured by confirmatory factor analysis and the estimates extracted from the results for each factor. The reliability and validity of SCAPS were generally verified.

Severity Analysis for Occupational Heat-related Injury Using the Multinomial Logit Model

BackgroundWorkers are often exposed to hazardous heat due to their work environment, leading to various injuries. As a result of climate change, heat-related injuries (HRIs) are becoming more problematic. This study aims to identify critical contributing factors to the severity of occupational HRIs. MethodsThis study analyzed historical injury reports from the Occupational Safety and Health Administration (OSHA). Contributing factors to the severity of HRIs were identified using text mining and model-free machine learning methods. The Multinomial Logit Model (MNL) was applied to explore the relationship between impact factors and the severity of HRIs. ResultsThe results indicated a higher risk of fatal HRIs among middle-aged, older, and male workers, particularly in the construction, service, manufacturing, and agriculture industries. In addition, a higher heat index, collapses, heart attacks, and fall accidents increased the severity of HRIs, while symptoms such as dehydration, dizziness, cramps, faintness, and vomiting reduced the likelihood of fatal HRIs. ConclusionsThe severity of HRIs was significantly influenced by factors like workers’ age, gender, industry type, heat index , symptoms, and secondary injuries. The findings underscore the need for tailored preventive strategies and training across different worker groups to mitigate HRIs risks.