Dose–response relationship between urinary PAH metabolites and blood viscosity among coke oven workers: a cross-sectional study
ObjectivesPolycyclic aromatic hydrocarbons (PAHs) have been proven to be a risk factor for cardiovascular disease in coke oven workers, and increased plasma viscosity is a signal for higher risk of catching up cardiovascular disease. We want to explore whether the plasma viscosity is affected by the concentration of PAHs.DesignOur study is a cross-sectional dose–response study.SettingParticipants in this study came from a coke plant in Taiyuan, Shanxi.ParticipantsWe used data of 693 coke oven workers in Taiyuan.Primary and secondary outcome measuresWe assumed that plasma viscosity would increase as the concentration of PAHs metabolites in urine increases. We found that 2-hydroxyfluorene (OHFLU2) and plasma viscosity have a stable linear relationship in different statistical methods.ResultsWe found that plasma viscosity increased by 1.14 (mPa.s,30/s) for each ng/mL of 2-OHFLU urinary (correlation coefficient range: 0.54–1.74, p<0.05).ConclusionsThe results of this study could provide evidence for coke oven workers to prevent cardiovascular disease by checking whether plasma viscosity is elevated.