Biological exposure monitoring is particularly useful for understanding skin absorption of hazardous substances; however, existing measurement methods for aromatic amines show room for improvement, as they focus on only unchanged compounds. This study aimed to determine urinary concentrations of the unchanged compounds and metabolites of three aromatic amines (aniline, 2,4-dimethylaniline [m-xylidine], and 2-methylaniline [o-toluidine]) following enzymatic hydrolysis pretreatment, calculate their proportions, and assess markers for occupational biological exposure monitoring.

Various factors influence urinary hippuric acid concentrations; however, the role of climatic factors in this process has not been thoroughly investigated.

We used real-time dosimetry for the quantitative evaluation of occupational radiation exposure among zoo veterinarians and animal keepers during X-ray procedures and identified key procedural and contextual determinants of exposure variation.

Performing chest compressions in high-temperature environments may increase the physiological strain on rescuers, potentially affecting the quality of cardiopulmonary resuscitation (CPR). This study aimed to examine the effects of environmental temperature on physiological responses, perceived exertion, and chest compression performance.

A simple method to clinically evaluate the sweating rate and the salt loss rate via sweating will enable the early detection of heat-related illness in workers. We measured K+ concentration in sweat and calculated Na+/K+ ratio to evaluate its utility for estimating sweating rate and salt loss rate. We hypothesized that compared with single electrolyte concentrations, Na+/K+ ratio would be less affected by the rapid evaporation of sweat.

Essential workers, particularly in healthcare and social services were critical during the peak of the COVID-19 pandemic, yet their mental health outcomes remain understudied. We examined changes in (i) sickness absence (SA) due to common mental disorders (CMDs) and (ii) antidepressant prescription in health and social care workers during vs. pre-pandemic periods.

This study aimed to develop and validate two concise measures of workplace loneliness.

To quantify the short-term impact of an unexpected stay-at-home exposure caused by the shipment suspension on body mass index (BMI) and cardiometabolic markers among employees with different levels of occupational physical activity.

This study aimed to develop a method for determining workers' exposure concentrations to airborne N-isopropyl-N'-phenyl-p-phenylenediamine (IPPD).

Epoxy resins are a common cause of occupational allergic contact dermatitis. Carbon fiber-laminated epoxy resin (CFLER) is a newer material with enhanced mechanical properties, but its health effects remain underreported. A 46-year-old male worker developed erythroderma involving >90% of his body surface and dyschromia after chronic exposure to CFLER in a confined workspace. Skin biopsy demonstrated features of chronic dermatitis, and immunohistochemistry revealed uneven melanocyte distribution. Laboratory studies showed elevated immunoglobulin E levels without internal organ dysfunction. Chest radiography indicated prominent bronchovascular markings without clinical symptoms. Intervention with topical clobetasol and avoidance of CFLER led to gradual resolution of erythroderma and improvement of dyschromia. Unlike previous reports focusing on acute epoxy resin dermatitis, this case highlights chronic skin changes and pigmentary alterations. Chronic exposure to CFLER can lead to melanocyte dysfunction, resulting in hyperpigmentation and hypopigmentation. Prompt identification and management are crucial to prevent severe complications such as high-output cardiac failure. This case emphasizes the importance of protective measures against CFLER exposure to prevent severe occupational dermatological conditions, including erythroderma and dyschromia.

The current study aimed (1) to examine the associations between bidirectional work-family conflict, comprising work-to-family conflict (WFC) and family-to-work conflict (FWC), and two mental health outcomes: psychological distress and mental disorder; and (2) to examine the associations between demographic variables and work-family conflict among Japanese working women.

Voice and emotional analyses have gained attention in the diagnosis and monitoring of depression in clinical settings. However, evidence supporting its use for early detection in occupational health is lacking. This study aimed to develop a predictive model to identify early depressive symptoms in workers using voice and emotional analyses.

This study aimed to evaluate, using wearable sensors, the impact of transitioning from an 8-hour to a 12-hour shift schedule on sleep patterns and well-being in intensive care unit (ICU) nurses with pre-existing sleep disturbances. We also examined differences in outcome based on chronotype.

Japan faces the need for occupational health management based on an understanding of workers' health and its impact on work productivity. Given a paucity of comprehensive studies, we conducted this study to investigate work productivity by diseases among workers of various occupations in Japan, by using a large-scale database.

Self-rated health is a comprehensive measure of health status that may influence occupational accidents, particularly those involving human factors. This study aimed to examine the relationship between self-rated health and occupational accidents across various industries and occupations. We also investigated the relationship stratified by the type of accidents.

This study examined the characteristics of employees with low health interest using Breslow's Health Practice Index (HPI).

Many Japanese adults experience poor sleep quality. Prolonged sedentary behavior negatively affects health, including sleep-associated problems. We investigated the association between sedentary behavior and sleep quality among urban white-collar workers in Japan with metabolic syndrome or at risk of metabolic syndrome, a population thought to have particularly prolonged sedentary time.

This systematic review aimed to synthesize the effectiveness of work ability interventions on productivity outcomes.

This study aimed to develop a personal exposure measurement method that concurrently determines both the inhalable fraction and vapor concentration of tri-n-butyl phosphate (TBP).

Passenger rail drivers' physical behaviors contribute to individual, organizational, and community risks. As work tasks are theorized to determine physical behaviors performed during work hours, there is a need to clarify how work tasks determine passenger rail drivers' physical behaviors to inform improved work design. The aim of this study was to describe the physical behaviors of passenger train drivers across their work tasks and breaks, and explore what potential influences create variations in physical behaviors within tasks.

The purpose of this secondary analysis of data from a previous randomized controlled trial (RCT) was to investigate whether an internet-based cognitive behavioral therapy (iCBT) stress management program improved work performance, sick leave, and intention to leave among nurses in Vietnam and Thailand during the COVID-19 pandemic.