Association between unpredictable work schedule and work-family conflict in Korea.

Background: As unpredictable work schedule (UWS) has increased worldwide, various studies have been conducted on the resulting health effects on workers. However, research on the effect of UWS on workers' well-being in Korea is still insufficient. This study aimed to investigate the relationship between UWS and work-family conflict (WFC) using 6th Korean Working Conditions Survey (KWCS).

Association between shift work and serum homocysteine level in female electronic manufacturing services workers.

Background: Shift work has been shown to increase the risk of cardiovascular disease (CVD) based on several evidences. The classic risk factors of CVD include age, hypertension, smoking, obesity and diabetes. Recently, the serum homocysteine level has been reported to be a valuable indicator of CVD risk.

Association between coronavirus disease 2019-related workplace interventions and prevalence of depression and anxiety.

Background: Although coronavirus disease 2019 is causing a variety of psychological problems for workers, there are few longitudinal studies on changes in workers' mental health by workplace intervention. This study aimed to evaluate the change in the prevalence of depression and anxiety according to the active involvement of the workplace.

Methods: This study was conducted on 1,978 workers at a workplace who underwent a health screening from January 2019 to August 2020, and classified depression and anxiety disorders using a self-report questionnaire.

Distribution of Lung-RADS categories according to job type in a single shipyard workers.

Background: Recently, lung cancer screenings based on age and smoking history using low-dose computed tomography (LDCT) have begun in Korea. This study aimed to evaluate the distribution of lung imaging reporting and data system (Lung-RADS) categories in shipyard workers exposed to lung carcinogens such as nickel, chromium, and welding fumes according to job type, to provide basic data regarding indications for LDCT in shipyard workers.

Methods: This study included 6,326 workers from a single shipyard, who underwent health examinations with LDCT between January 2010 and December 2018.

The effect of shift work on high sensitivity C-reactive protein level among female workers.

Background: This study assessed the association between shift work and high-sensitivity C-reactive protein (hs-CRP) level, a risk factor for cardiovascular disease (CVD), in female workers in electronics manufacturing services (EMS).

Methods: Female EMS workers who received special medical examinations for workers in Gyeongnam, Korea between January 2017 and December 2017 were enrolled in this study. Their age, marital status, education level, alcohol consumption, smoking habit, regular exercise, quality of sleep, work stress, and depression were investigated, and blood tests were conducted.

Comparison of risk-assessment tools for cardio-cerebrovascular diseases (CVD) in male shipyard workers: a cross-sectional study.

Background: Periodic revision of assessment tools is essential to ensure risk assessment reliability and validity. Despite the recent revision of the Korea Occupational Safety and Health Agency (KOSHA) 2018, there is no evidence showing that the revision is superior to other cardio-cerebrovascular diseases (CVDs) risk-assessment tools for workplace health management. We conducted a comparative analysis using the Framingham risk score (FRS) as a gold standard to identify the most relevant CVDs risk-assessment tool for workplace health management.

Changes of depression and job stress in workers after merger without downsizing.

Background: Since the 1980s, restructuring, which includes downsizing, closures, mergers, and privatization, has expanded worldwide, and various studies have investigated its effect on health. However, previous studies have mainly focused on restructuring accompanied by massive lay-offs, and the effect of a merger on workers' health is still controversial. This study aims to investigate changes in worker depression and job stress after a merger without downsizing, which is unusual in Korea.

The relationship between serum vitamin D levels and sleep quality in fixed day indoor field workers in the electronics manufacturing industry in Korea.

Background: Although recent studies have investigated the influence of vitamin D on sleep patterns, there is a lack of research on the relationship between vitamin D and sleep patterns in Korean workers. This study focused on the relationship between serum vitamin D levels and sleep in fixed day indoor field workers in the electronics manufacturing industry in Korea.

Methods: The 1472 subjects who were included in this study were selected from fixed day workers in the electronics manufacturing industry who had received a worker's special health examination at a hospital in Changwon, South Gyeongsang Province between January 2015 and December 2015.

Erratum to: The relationship between quality of sleep and night shift rotation interval.

[This corrects the article DOI: 10.1186/s40557-015-0084-x.].

Association between serum vitamin D and depressive symptoms among female workers in the manufacturing industry.

Background: Vitamin D has been known to maintain the body's balance of calcium and phosphorus as well as skeletal health. There has been increasing emphasis on the importance of vitamin D as recent studies have been reporting the specific functions of vitamin D in the cerebral nervous system and the association between the level of serum vitamin D and depressive symptoms. However, there is currently a paucity of research investigating the association between serum vitamin D and depressive symptoms in Korean subjects.

The relationship between quality of sleep and night shift rotation interval.

Background: Shift work is closely related with workers' health. In particular, sleep is thought to be affected by shift work. In addition, shift work has been reported to be associated with the type or direction of shift rotation, number of consecutive night shifts, and number of off-duty days.

Are differences in external noses between whites and Koreans caused by differences in the nasal septum?

The nasal septum plays an important role in nose development. East Asians are believed to have inherent hypoplasia of the nasal septum because East Asians have smaller noses than whites do. However, there have been no studies of nasal septum differences between whites and East Asians.

Are gender differences in external noses caused by differences in nasal septal growth?

Background: The nasal septum plays an important role in nasal growth, but there have been few reports on the relationship between the septum and nasal growth. The authors investigated the relationship between septa and external noses using computed tomography during the growth period.

Methods: One hundred and ninety-eight patients under the age of 21 were enrolled in this study between 2008 and 2012.

Metabolic syndrome, lifestyle risk factors, and distal colon adenoma: a retrospective cohort study.

Aim: To investigate relationships between colorectal adenoma incidence, metabolic syndrome (MS) components and lifestyle factors.

Methods: We conducted a retrospective cohort study using data from individuals who had multiple sigmoidoscopies for colon cancer at the Health Promotion Center of Ulsan University Hospital in Korea from 1998 to 2007.

Results: By multivariate analysis, the incidence of distal colon adenoma was increased by more than 1.