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, 33 (3), 235-242

Shift Work and the Risk of Cardiovascular Diseases and Metabolic Syndrome Among Jordanian Employees

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Shift Work and the Risk of Cardiovascular Diseases and Metabolic Syndrome Among Jordanian Employees

Rana Abu Farha et al. Oman Med J.

Abstract

Objectives: We sought to evaluate the effect of night shift working on increasing the risk of developing cardiovascular disease (CVD) using three different predictors.

Methods: One hundred and forty adult Jordanian employees were recruited in this cross-sectional study. Demographic data, anthropometric parameters, and working patterns information were documented. Metabolic syndrome (MetS) was diagnosed, and atherogenic index of the plasma (AIP) and Framingham risk score were calculated.

Results: Night shift workers had a significantly higher AIP ratio compared to daytime workers (p = 0.024). No significant association was observed between the two groups in term of 30-year Framingham risk score (p = 0.115). However, the duration of night shifts and the number of night shifts per months were found to significantly increase the 30-year Framingham risk (p = 0.000 and 0.012, respectively). Furthermore, the incidence of MetS among night shift workers was 15.9% (13/82) compared to 10.3% (6/58) among daytime workers (p = 0.484).

Conclusions: This is the first study to assess the association between night shift work and AIP as well as the 30-year Framingham risk score as predictors of CVDs. Night shift work was associated with an increase in AIP score compared to daytime work. Also, the duration of night shifts and the number of night shifts per month significantly increased the 30-year Framingham risk among night shift workers. These findings suggest an association between night shift work and the risk of CVD and atherosclerosis. Our results highlight the need for interventional strategies to diminish the risk of CVD in night shift workers.

Keywords: Cardiovascular Diseases; Jordan; Metabolic Syndrome; Night Shift Work; Risk.

Figures

Figure 1
Figure 1
Mean value and standard error of the mean of atherogenic index of plasma (log triglyceride/high-density lipoprotein cholesterol among Jordanian employees working day or night shifts. Comparison was performed using one-way analysis of covariance (after adjusting for age and gender) (F-value = 5.1, df = 1, p = 0.024).
Figure 2
Figure 2
Mean value and standard error of the mean of Framingham risk for cardiovascular diseases (30 years risk) among Jordanian employees working day or night shifts. Comparison was performed using one-way analysis of covariance (after adjusting for age and gender effect) (F-value = 2.5, df = 1, p = 0.115).
Figure 3
Figure 3
Prevalence of MetS among Jordanian employees according to their working groups. Comparison was performed using hierarchical multiple logistic regression after adjusting for age and gender (p = 0.484).

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