Polycyclic aromatic hydrocarbons (PAHs) are regarded as environmental pollutants that contribute to several adverse health outcomes. There is no research evidence to support a connection between PAH exposure and hearing loss. Our study aimed to determine the association between PAH exposure and hearing threshold shifts using the National Health and Nutrition Examination Survey (NHANES) dataset. A cross-sectional study was conducted among 1,071 US adults participating in the NHANES from 2001 to 2004. The association between PAH metabolites and the log-transformed hearing threshold was investigated using multivariate regression models, which included log-transformed, low-frequency and high-frequency thresholds. After additional pertinent adjustments, a positive correlation between PAH metabolite concentration and log-transformed hearing thresholds was observed. Individuals in the fourth quartile of PAH metabolite concentration had higher hearing thresholds compared with those in the first quartile of PAH metabolite concentration. Exposure to PAHs is related to hearing threshold shift at both low and high frequencies in the US adult population.
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