[Incidence of metabolic syndrome and associated lifestyle factors in a worksite male population].

OBJECTIVES: The prevention of metabolic syndrome (MetS) is one of the main targets of health promotion activities in the workplace. The present study aimed to clarify the incidence of MetS and associated lifestyle factors in a worksite male population. METHODS: The study subjects consisted of 948 working men (mean age: 44 yr old) who did not meet the Japanese criteria for MetS during the annual health examination at a precision instrument development plant in Kanagawa, Japan, 2005. New-onset MetS was followed using the health examination data from 2006 to 2009. The incidence of MetS according to the combination of the presence of abdominal obesity and the number of other components of MetS (elevated blood pressure, dyslipidemia, and elevated fasting glucose) at baseline were calculated. The incidence of MetS was also compared among the groups with regard to differences in lifestyles (dietary habits, smoking status, sleep duration, exercise habits, and alcohol intake). A Cox proportional hazard model was used to identify independent factors contributing to an increased risk of MetS. RESULTS: New-onset MetS was observed in 76 subjects during a mean follow-up period of 3.7 yr. The incidence of MetS was 2.2/100 person-years and the 4-year incidence of MetS according to Kaplan-Meier analysis was 8.5%. The highest 4-year incidence of MetS was found in the group without abdominal obesity but with two or more components of MetS (37.9%) and the second highest incidence was found in the group with abdominal obesity and one other component of MetS (24.6%). The presence of abdominal obesity and each increase in the number of other components of MetS had an increased age-adjusted hazard ratio for an increased risk of MetS (5.23 and 4.79, respectively, both p<0.001). Similarly, sleep duration 5 h or less, current smoking, and ethanol intake 300 g/wk or more had an increased age-adjusted hazard ratio for an increased risk of MetS. CONCLUSIONS: The present study showed a high incidence of MetS in not only the group with abdominal obesity, but also the group without abdominal obesity but with two or more components of MetS. Sleep deprivation, current smoking, and excess alcohol intake were found to be factors contributing to an increased risk of MetS among several lifestyle factors examined. The usefulness of health promotion activities that preferentially target subjects who have such medical conditions and/or lifestyles are therefore expected to reduce the incidence of MetS in the workplace, from a high-risk strategy viewpoint.

[Qualitative evaluation of employer requirements associated with occupational health and safety as good practice in small-scale enterprises].

The purpose of this study was to identify what motivates employers to promote good occupational health and safety practices in small-scale enterprises. Previous studies have shown that small-scale enterprises generally pay insufficient attention to issues of occupational health and safety. These findings were mainly derived from questionnaire based surveys. Nevertheless, some small-scale enterprises in which employers exercise good leadership do take a progressive approach to occupational health and safety. Although good practices can be identified in small-scale enterprises, it remains unclear what motivates employers in small-scale enterprises to actively implement occupational health and safety practices. We speculated that identifying employer motivations in promoting occupational health would help to spread good practices among small-scale enterprises. Using a qualitative approach based on the KJ methods, we interviewed ten employers who actively promote occupational health and safety in the workplace. The employers were asked to discuss their views of occupational health and safety in their own words. A semi-structured interview format was used, and transcripts were made of the interviews. Each transcript was independently coded by two or more researchers. These transcripts and codes were integrated and then the research group members discussed the heading titles and structural relationships between them according to the KJ method. Qualitative analysis revealed that all the employers expressed a strong interest in a "good company" and "good management". They emphasized four elements of "good management", namely "securing human resources", "trust of business partners", "social responsibility" and "employer's health condition itself", and considered that addressing occupational health and safety was essential to the achievement of these four elements. Consistent with previous findings, the results showed that implementation of occupational health and safety activities depended on "cost", "human resources", "time to perform", and "advisory organization". These results suggest that employer awareness of the relationship between good management and occupational health is essential to the implementation of occupational health and safety practices in small-scale enterprises.

The challenges of occupational health service centers in Japan.

The improvement of occupational health conditions in Small- and medium-scale enterprises (SMEs) is the most crucial issue in occupational health in Japan today. Improvement will depend on how occupational health services are provided to SMEs. Recently, Occupational Health Service Centers (OHSCs) providing occupational health services for SMEs have become more firmly established and expectations for further improvement in quality and quantity are high. In this way it is hoped that the challenges of providing "occupational health for all" can be met.

Occupational health nurses' participation in health committee surveyed in Yamaguchi prefecture, Japan.

This survey was conducted to know the present conditions of occupational health nurses (OHNs) activity related to health committees (HCs) in Japan. Questionnaires that included items related to duties of the OH physician (OHP), those of the OHN, and their mutual duties within the HC, were mailed to 41 companies employing OHNs and questionnaires from 18 companies were analyzed. Comparison of the frequency of OHN attendance at Health Committee Meetings (HCMs) revealed that 33.3% of OHNs attended the HCs when their companies employed full-time OHPs and 83.3% attended when their companies employed part-time OHPs. In a question about the OHN's opportunity to deliver a speech, give a report or make a presentation at their HCMs, 16.7% of OHNs in companies with full-time OHPs and 66.7% of OHNs in companies with part-time OHPs reported they had such opportunity. In companies with part-time OHPs, 50.0% of the OHNs reported that they were asked for their opinions at the HCMs, but OHNs at companies employing full-time OHPs were not asked for their opinions. It was considered that in the future, OHNs, particularly those working with a part-time OHP, will have an important role in the HC and developing OH services for their companies.

Influence of waterproof covering on finger skin temperature and hand pain during immersion test for diagnosing hand-arm vibration syndrome.

The purpose of this study was to examine the influence of waterproof covering on finger skin temperature (FST) and hand pain during immersion test for diagnosing hand-arm vibration syndrome complying with the proposal of the International Organization for Standardization (ISO/ CD14835-1, 2001) for measurement procedure. Six healthy male subjects took part in the immersion tests and immersed their both hands into water at 12 degrees C for 5 min, repeatedly with two types of waterproof covering (polyethylene and natural rubber gloves) or without hand covering (bare hands) during immersion. The FST data from middle fingers and subjective pain scores for hand pain were analyzed. Statistically significant differences in FST among three conditions were observed showing the highest FST with natural rubber gloves, followed by the FST with polyethylene gloves and the lowest with bare hands. Significant differences in pain score among three conditions were observed during immersion showing the lowest pain score with natural rubber gloves, followed by the pain score with polyethylene gloves and the highest with bare hands. Immersion test with polyethylene gloves instead of bare hands during immersion seems to be suitable for reducing subject suffering.

A comparison of heart rate during rest and work in shift workers with different work styles.

To determine if the type of work performed should be considered in research on shift work and cardiovascular disease, we compared the heart rates, total number of steps walked, and blood pressures of 12 shift workers on the same rotating 3-shift schedule in a pulp and paper mill. Six workers were selected from the paper manufacturing section (group 1) and six workers from the chemical products section (group 2). Average heart rate (in beats per min) monitored during duty time was 84.3 in group 1 and 87.4 in group 2. Average heart rate during work was not significantly higher than that during rest in both groups 1 (work 85.8, rest 75.3) and 2 (work 87.9, rest 83.1). There was no significant difference in the total number of steps walked. A non-significant decrease in systolic blood pressure value was found in group 1 compared with that in group 2. Although future studies will be needed to explain the relation between different work styles and their effects on the health of shift workers, our results suggest no significant difference in heart rates among workers engaged in different kinds of work on the same shift work schedule.