Associations of Work Hours and Actual Availability of Weekly Rest Days with Cardiovascular Risk Factors

Itani, Osamu; Kaneita, Yoshitaka; Ikeda, Maki; Kondo, Shuji; Murata, Akira; Ohida, Takashi

doi:10.1539/joh.12-0034-oa

Cited by 18 publications

(21 citation statements)

References 28 publications

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“…A recent study in Japan showed no association between working hours and hypertension risk (Itani et al, 2013). In contrast, another Japanese study showed that DBP but not SBP was positively associated with working hours in assembly-line workers and no significant association of SBP and DBP with working hours in clerks or engineers/special technicians (Nakamura et al, 2012).…”

Section: Discussionmentioning

confidence: 91%

“…Specifically, Nakamura et al (2012), Artazcoz et al (2009) andYang et al (2006) found a positive linear relationship in overall subjects or some sub-groups, whereas Itani et al (2013) and Pimenta et al (2009) showed no significant relationship, and Wada et al (2006) and Nakanishi et al (2001) reported an inverse relationship. These studies have limitations in their design.…”

Section: Introductionmentioning

confidence: 84%

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Association of overtime work and hypertension in a Japanese working population: A cross-sectional study

Imai

Kuwahara

Nishihara

et al. 2014

Chronobiology International

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Long working hours have been associated with an increased risk of cardiovascular disease, but its relationship with hypertension remains unclear. The objective of this study is to examine the relationship between overtime and presence of hypertension using data from a large-scale multi-company study in Japan. Participants were 52 365 workers of four companies that provided both health-checkup data and self-reported data on overtime worked. Hypertension was defined as systolic blood pressure ≥140 mmHg, diastolic blood pressure ≥90 mmHg, and/or the use of antihypertensive drug. Logistic regression analysis was performed to determine the odds ratio for hypertension for each category of overtime work (<45, 45-79, 80-99 or ≥100 h/month) with adjustments for age, sex, company, smoking status and body mass index. The prevalence of hypertension tended to decrease with increasing overtime work: 17.5, 12.0, 11.1 and 9.1% for the shortest (<45 h/month) through the longest overtime category (≥100 h/month). The age-, sex- and company-adjusted odds ratios (95% confidence interval) were 1.00 (reference), 0.81 (0.75-0.86), 0.73 (0.62-0.86), 0.58 (0.44-0.76), respectively (p for linear trend <0.001). In a sub-cohort, the inverse association remained statistically significant after an additional adjustment for other potential confounders. Results of the present large-scale study among Japanese workers suggest an inverse association between overtime work and presence of hypertension.

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 84%

Association of overtime work and hypertension in a Japanese working population: A cross-sectional study

Imai

Kuwahara

Nishihara

et al. 2014

Chronobiology International

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“…Itani et al (24) reported that working in shifts was responsible for a rise of up to 40% in the incidence of CVD among their study population. In our study, 10% of the studied samples never exercised and only 37% exercised between once and 5 times a week or more.…”

Section: Discussionmentioning

confidence: 92%

Lifestyle and the Most Important Risk Factors of Cardiovascular Disease in Physicians, Nurses, and Faculty Members

Nobahar

Razavi

2015

Middle East J Rehabil Health

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Background: Health and treatment groups have the chief responsibility for controlling the risk factors of cardiovascular disease (CVD) and encouraging appropriate lifestyle changes that affect the prevention of this disease. Objectives: We sought to assess the lifestyle of physicians, nurses, and faculty members and to determine the most important risk factors of CVD among them. Patients and Methods: This cross-sectional study was conducted on the physicians, nurses, and faculty members of Semnan University of Medical Sciences. The risk factors of CVD under consideration included smoking; sporting habits; life-and work-related stress; consumption of fruit, vegetables, fish, meat, and fast food; body mass index; systolic and diastolic blood pressures; control of cholesterol, triglyceride, and blood sugar levels in the preceding two years; history of depression; and family history of CVD. Results: Totally, 108 subjects who filled in their questionnaires were included in the study. The study population, including 68.5% females, had a mean age of 36.30 ± 8.878 years. Smokers comprised 1.8% of the subjects. Exercise more than twice a week was reported by 19.4%. Correspondingly, severe and moderate life-related and work-related stress was reported by 61.1% and 63.9% of the subjects. Also, 17.6% and 51.9% of the respondents consumed vegetables and fruit, respectively, more than once a day; 5.6% had fish more than once a week; and 69.4% and 4.6% ate meat and fast food, respectively, more than twice a week. The mean body mass index was 24.67 ± 3.77, and 39.8% of the participants were overweight or fat. A history of CVD was reported in 0.9%, history of hypertension in 2.8%, history of diabetes in 1.9%, and history of depression in 6.5% of the subjects. High triglyceride levels were detected in 7.4%. Additionally, 45% and 53.7% had controlled their cholesterol and triglyceride levels and blood sugar, correspondingly, for the preceding 2 years. A history of CVD was reported in 20.4% of the study population. The emphasis on CVD risk-factor control was lower among the physicians than among the nurses and faculty members. Conclusions:The findings of the present study indicate the necessity of modifying lifestyle and controlling CVD risk factors to upgrade the programs of the national health system for reducing the incidence of this disease.

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“…A cross-sectional study on the association between daily working hours and metabolic syndrome in male Japanese workers reported significant outcome in subjects aged 40 or more, but, no significant association was observed between working hours and prevalence of metabolic syndrome when stratified by age [12]. However, a longitudinal study conducted for male workers in local public institutions of Japan suggested that long working hours increase the onset risk of hypertriglycemia [19]. In addition, a recent study conducted for Korean adults [5] demonstrated that long working hours are significantly related to risk of coronary heart disease.…”

Section: Discussionmentioning

confidence: 99%

The association between long working hours and the metabolic syndrome: evidences from the 5th Korean National Health and Nutrition Examination Survey of 2010 and 2012

Jeong

Jeon

Sakong

2014

Ann of Occup and Environ Med

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ObjectivesThis study was conducted in order to evaluate the association between the working hours of Korean employees and the metabolic syndrome and the effects of long working hours on metabolic syndrome based on the 5th Korean National Health and Nutrition Examination Survey (2010-2012).MethodsBased on the 5th Korean National Health and Nutrition Examination Survey (2010-2012), 4,456 Korean employees without shift work, aged over 15, who work 30 hours or more per week were targeted in this study. The association between the general characteristics, including age, smoking, alcohol drinking, exercise, and the metabolic syndrome criteria defined by International Diabetes Federation (IDF) and weekly working hours were analyzed. In addition, the association between weekly working hours and the metabolic syndrome of the subjects stratified by gender was analyzed through multiple logistic regression analyses and generalized linear mixed model after adjusting the general characteristics.ResultsIn the results of stratified analysis by gender, in male subjects, in comparison with the 30-39 weekly working hours group, there were no significant adjusted odds ratios to the other working hours groups. In female subjects, in comparison with the 30-39 weekly working hours group, there were no significant adjusted odds ratios to the other working hours groups. In addition, no trend associations were observed among weekly working hour groups in both stratified genders.ConclusionNo significant differences in prevalence of metabolic syndrome of the subjects stratified by gender were found according to weekly increasing working hours. However, due to some limitations of this study, further prospective studies may be necessary for verification.

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Associations of Work Hours and Actual Availability of Weekly Rest Days with Cardiovascular Risk Factors

Cited by 18 publications

References 28 publications

Association of overtime work and hypertension in a Japanese working population: A cross-sectional study

Association of overtime work and hypertension in a Japanese working population: A cross-sectional study

Lifestyle and the Most Important Risk Factors of Cardiovascular Disease in Physicians, Nurses, and Faculty Members

The association between long working hours and the metabolic syndrome: evidences from the 5th Korean National Health and Nutrition Examination Survey of 2010 and 2012

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