Urinary 8-hydroxydeoxyguanosine levels and psychological reactions after sleep deprivation.

The aim of this study was to investigate whether changes in urinary 8-hydroxydeoxyguanosine (8-OH-dG), an oxidative stress indicator, occur or not, and how psychological reactions change, after one night of sleep deprivation (SD) and after 7 hour recovery sleep opportunities during three recovery days. Twenty healthy subjects participated in this study. We measured their urinary 8-OH-dG levels and psychological reactions using the Profile of Mood States (POMS) for 5 days: on the baseline day, the post-vigil day, and on 3 recovery days after SD.

Development of a work improvement checklist for occupational mental health focused on requests from workers.

Objectives: To develop tools offering definite orientation for managers and employees to support their work improvement through occupational mental health. This research was a part of the Mental Health Improvement & Reinforcement Study (MIR study), conducted from October 2004 to March 2006.

Methods: We developed a trial version named the Kaizen Check List (KCL) by referring to problem solving methods for quality management.

[Expertise level of occupational health physician, implementation of occupational safety and health management system (OSHMS) and occupational safety and health activity level in Japan in the companies listed on Tokyo Stock Exchange first section].

By enforcement of the revised Japanese Industrial Safety and Health Law on April, 2006, the implementation of OSHMS seems to be expanding and encouraged. In OSHMS of Japan, however, the occupational health aspects have not been put into operated, while only occupational safety aspects have been prioritized. To clarify the issues to deploy OSHMS with occupational health aspects, we conducted a mail survey of 1,581 companies listed on the Tokyo Stock Market First Section in December, 2004.