Correlates of depressive symptoms among workers in small- and medium-scale manufacturing enterprises in Japan.

Background: Although the relationship between job stress and depressive symptoms has been well documented among workers in large scale enterprises, the situation in small- and medium-scale enterprises (SMEs) is not fully understood.

Objectives: To clarify the factors associated with depressive symptoms in SMEs in Japan.

Methods: 1,516 male and 738 female Japanese workers at SMEs were surveyed using a self-administered questionnaire.

Association of active and passive smoking with sleep disturbances and short sleep duration among japanese working population.

Background: The relationship between passive smoking and sleep is uncertain.

Purpose: To examine the association of passive/active smoking with sleep disturbances.

Method: 732 women and 1,896 men, working in a suburb of Tokyo, were surveyed using a self-administered questionnaire.

Perceived psychosocial job stress and sleep bruxism among male and female workers.

Objective: Psychosocial job stress has been associated with sleep disturbances, but its association with sleep bruxism (SB), the stereotype movement disorder related to sleep, is not well understood. The aim of this epidemiological study was to examine the relationship between psychosocial job stress and SB.

Methods: 1944 male and 736 female factory workers participated in this study (response rate 78.

Active and passive smoking and depression among Japanese workers.

Objective: To assess the relation of passive and active smoking to depressive symptoms in 1839 men and 931 women working in a suburb of Tokyo in 2002.

Method: Self-reported smoking history and exposure to passive smoking (no, occasional, or regular) at work and at home. Depressive symptoms according to the Center for Epidemiologic Studies Depression Scale, with a cut-off point of 16.

Perceived job stress and sleep-related breathing disturbance in Japanese male workers.

To examine the association of job stress with sleep-related breathing disturbance (SBD), a cross-sectional sample of 1940 males aged 17-83 (mean 45) years in 292 small and medium-sized enterprises in Japan were surveyed by means of a self-administered questionnaire. Perceived job stress was evaluated by the Japanese version of the Generic Job Stress Questionnaire developed by the US National Institute for Occupational Safety and Health, which included 13 job stress variables. Participants were divided into thirds according to their job stress scores.

The prevalence and correlates of occupational injuries in small-scale manufacturing enterprises.

Workers involved in small-scale manufacturing businesses are known to comprise a high-risk population for occupational injury. The present study investigated the prevalence and correlates of occupational injury in this population. A self-administered questionnaire that solicited answers about occupational information including injury, demographic characteristics, health conditions and lifestyle factors was collected from a sample of 1,298 workers in 228 small-scale manufacturing enterprises (defined as fewer than 50 workers) aged 16-78 (mean 46) yr in Yashio city, Saitama, Japan (response rate 65.

Non-fatal occupational injury among active and passive smokers in small- and medium-scale manufacturing enterprises in Japan.

Active smoking is a risk factor for occupational injury, whereas its association with passive smoking is unknown. To evaluate the contribution of active and passive smoking to non-fatal occupational injury in manufacturing sectors, 2302 randomly selected workers aged 16-83 years working in 244 small- and medium-scale enterprises in Yashio city, Japan, were surveyed by means of a self-administered questionnaire. Smoking history, exposure to passive smoking, and occupational injury were evaluated by self-report.

Impact of psychosocial job stress on non-fatal occupational injuries in small and medium-sized manufacturing enterprises.

Background: Workers involved in manufacturing are known to comprise a high-risk population for occupational injury, and this risk is greater in small and medium-sized enterprises (SMEs). The purpose of this study was to examine the association between psychosocial job stress and occupational injuries among workers in SMEs.

Methods: One thousand forty-nine men and 721 women from 244 SMEs participated in this study.

Sleep-related risk of occupational injuries in Japanese small and medium-scale enterprises.

A cross-sectional study evaluated the contribution of daily sleep habits to occupational injuries. A self-administered questionnaire solicited answers about sleep, symptoms of depression, occupational injury, demographics, presence of diseases and lifestyle factors from 2,903 workers between the ages of 16-83 (mean 45) yr in small and medium-scale enterprises. Eight sleep habits were queried and dichotomized: 1) less or more than 6 hr of daily sleep, 2) taking more or less than 30 min to fall asleep (Difficulty initiating sleep; DIS), 3) awakening during sleep more or less than 3 times/wk (Difficulty maintaining sleep; DMS), 4) early morning awakening more or less than 3 times/wk (EMA), 5) definitely/somewhat difficulty waking up or not, 6) sleeping very poorly/not so well at night or not, 7) definitely/somewhat insufficient nightly sleep or not, and 8) difficulty in breathing during sleep more than once/week or less.