OBJECTIVE: The Karolinska sleepiness scale (KSS) is frequently used for evaluating
subjective sleepiness. The main aim of the present study was to investigate the validity and …

Study Objectives: The present study examined the effects of indoor exposure to natural bright
light on afternoon sleepiness. Design: Participants took part in 3 experimental conditions: (1…

While the effects of a short nap on performance and arousal level have been well investigated,
less attention has been paid to its effects on mood status. The aim of the present study …

Objectives: This study aimed to conduct a systematic review and meta-analysis of randomized
controlled trials (RCTs) to improve subjective well-being (SWB), including evaluative, …

We investigated the association between worktime control and fatigue, sleep problems, and
depressive symptoms in a sample of daytime and shift workers. A total of 3681 permanent …

This study examined the relationship between coping skills, working hours, and psychological
health among Japanese daytime workers. Self-administered questionnaires were mailed …

The Brief Job Stress Questionnaire (BJSQ) is used widely in occupational health studies and
practice. Summarizing scientific production based on measurement is crucial. This study …

Characteristics of work organization other than working time arrangements may contribute
importantly to daytime sleepiness. The present study was designed to identify the …

Objective: We examined how change in work time control was associated with sleep and
health 1 year later. Methods: Work time control, sleep, fatigue, recovery, and depression were …

Background Although self-rated health (SRH) has been established as a robust predictor of
morbidity and mortality, the immunological mechanisms underpinning this relationship are …