A Comparison between the Second Korean Working Conditions Survey (KWCS) and the First KWCS

Association between occupational noise and vibration and anxiety in the South Korean working population: a cross-sectional study

BACKGROUND

Although occupational exposure to noise and vibration is common, its effect on psychological wellbeing is poorly understood. This study investigated the relationship between occupational exposure to noise and vibration and anxiety among Korean workers.

METHODS

Data from the 5th Korean Working Conditions Survey, conducted in 2017, were used. Participants were classified into four groups according to their level of exposure, and anxiety was assessed using a self-report questionnaire. Logistic regression analysis was used to examine the significance of the association between exposure and anxiety.

RESULTS

Overall, 45,241 participants were enrolled in this study. The likelihood of anxiety increased, in both males and females, when exposed to both occupational noise and vibration (males: odds ratio (OR) = 2.25, confidence interval [CI] = 1.77-2.87; females: OR = 2.17, CI = 1.79-2.61). The association between the varying degrees of noise, vibration, and combined exposure showed a dose-response relationship among males.

CONCLUSIONS

This study revealed that occupational noise and vibration exposure is associated with anxiety. These results suggest that more detailed regulations regarding occupational noise and vibration should be developed and implemented to ensure a safer environment for workers.

Analysis of self-reported mental health problems among the self-employed compared with paid workers in the Republic of Korea

Background

Methods

Results

Conclusions

Changing Factors of Employee Satisfaction with Working Conditions: An Analysis of the Korean Working Conditions Survey

Background

We hypothesized that the growing demand of Korean workers for work–life balance would change the factors influencing job satisfaction. We sought to verify our hypothesis by conducting a conjoint analysis based on the Korean Working Conditions Survey (KWCS).

Methods

We analyzed the raw data of the KWCS, conducted by the Occupational Safety and Health Research Institute from 2006 to 2017. To complete the analysis, we counted on a conjoint model of analysis, typically used in the analysis of customer satisfaction. The dependent variable was the satisfaction of workers with their working conditions, and the independent variables were the job quality indicators identified by Eurofound.

Results

The factors that have the greatest impact on working conditions satisfaction are summarized as follows: “physical environment” for the first wave, “adverse social behavior” for the second wave, “occupational status” for the third and fourth waves, and “management quality” for the fifth wave. “Earnings” were not a major factor in determining employee job satisfaction, and the relative importance index is decreasing.

Conclusion

According to the results of the analysis of the tendencies of Korean workers, the factors that affect the satisfaction with the working conditions have changed over time. It is crucial to identify factors that affect working conditions to assure the health and productivity of workers. The results of this study demonstrate that policymakers and employers are required to attentively consider human relations and social environment at work to improve working conditions in the future.

A Comparison of Safety, Health, and Well-Being Risk Factors Across Five Occupational Samples

Objective: The aim of this study was to present safety, health and well-being profiles of workers within five occupations: call center work (N = 139), corrections (N = 85), construction (N = 348), homecare (N = 149), and parks and recreation (N = 178). Methods: Baseline data from the Data Repository of Oregon's Healthy Workforce Center were used. Measures were compared with clinical healthcare guidelines and national norms. Results: The prevalence of health and safety risks for adults was as follows: overweight (83.2%), high blood pressure (16.4%), injury causing lost work (9.9%), and reported pain (47.0%). Young workers were least likely to report adequate sleep (46.6%). Construction workers reported the highest rate of smoking (20.7%). All of the adult workers reported significantly lower general health than the general population. Conclusion: The number of workers experiencing poor safety, health and well-being outcomes suggest the need for improved working conditions.

Can Workplace Rest Breaks Prevent Work-Related Injuries Related to Long Working Hours?

OBJECTIVE

This study examined the relationship between long working hours, rest breaks, and work-related injuries.

METHODS

A total of 25,439 employees were examined from the 4th Korean Working Conditions Survey. Rest breaks were divided into two groups and working hours were divided into four groups. Multiple logistic regression was conducted to estimate the relationship between long working hours, rest breaks, and work-related injuries.

RESULTS

Work-related injuries were significantly associated with long working hours. Stratified by rest breaks, the risk of work-related injuries increased with increasing working hours in a dose-response pattern among those with insufficient rest breaks, while the risk was not significant among those with sufficient rest breaks.

CONCLUSION

It is important to provide sufficient rest breaks to prevent work-related injuries among workers with long working hours.

Physical and mental health problems of self-employed small business owners in South Korea

BACKGROUND

Self-employed business owners in Korea make up one-quarter of the working population, and half of those who are self-employed are in micro and small businesses. Compared to the significant research interest in business management and economics, to date, there has been little interest in the health of small business owners. We investigated the health status of self-employed small business owners compared to standard workers.

METHODS

The third Korean Working Conditions Survey, which included a total of 32 630 adults aged 20 to 59 years, was analyzed. A small business was defined as an enterprise with between 0 and 4 workers. Standard employment included full-time employment with a permanent or 1-year contract. Health outcomes included eight types of physical health and mental health problems assessed using the WHO-5 Wellbeing Index.

RESULTS

Small business groups were found to have an increased prevalence of depression after controlling for all potential covariates (odds ratio [OR] = 1.37; 95% confidence interval [CI] 1.29-1.47). In addition, the prevalence of work-related physical health problems was significantly higher among self-employed small business owners in a full adjusted model: backache (OR = 1.16; 95% CI, 1.06-1.26), muscular pains in upper limbs (OR = 1.19; 95% CI, 1.12-1.27), and muscular pains in lower limbs (OR = 1.14; 95% CI, 1.07-1.22).

CONCLUSION

We found a positive association between small business entrepreneurs and increased prevalence of mental and physical illness in adults in the Republic of Korea.

Relationship Between Exposure to Second-Hand Smoke in the Workplace and Occupational Injury in the Republic of Korea

Background

Most studies in the field of smoking exposure in the workplace linked to occupational safety have only focused on active smoking. Few studies have reported that exposure to second-hand smoke in the workplace is a possible factor increasing the risk of occupational injury without considering occupational characteristics. The aim of this study was to determine the association between occupational injury and level of exposure to second-hand smoke at the workplace among Korean workers, after taking into account occupational characteristics.

Method

Using data from the third Korean Working Conditions Survey, levels of exposure to second-hand smoke were categorized as none, moderate, and high. We investigated the influence of exposure to second-hand smoke on occupational injury using logistic regression analysis with stratification by sex, smoking status, smoke-free policy in the workplace, and occupational characteristics. Occupational characteristics (occupational classification, working schedule, length of working day, and co-exposure to occupational hazards in the workplace) were stratified and analyzed using logistic regression models to estimate the risk of occupational injury linked to exposure to second-hand smoke.

Results

Among all participants, there was a significant dose-dependent association between risk of occupational injury and level of exposure level to second-hand smoke. After stratification by sex and smoking status, there was a significant association between risk of occupational injury and exposure level to second-hand smoke. Moreover, there was a significant relationship between exposure to second-hand smoke in the workplace and occupational injury, depending on the smoking-free policy at workplace (odds ratio [OR] in completely non-smoking workplace, 4.23; OR in non-smoking workplace with separate smoking area, 2.98; OR in smoking workplace 2.84). Additionally, there was a significant relationship between risk of occupational injury and exposure to second-hand smoke after stratification by occupational classification, working schedule, long working hours, and co-exposure to hazards in the workplace.

Discussion

There was a dose-response relationship between occupational injury and exposure to second-hand smoke, even after stratification to reduce the impact of various potential confounders and after taking into account occupational characteristics. These findings provide greater insight into the effects of exposure to second-hand smoke on the working population and may direct further research and policy-making in this field.