Figure 2
From: Higher exposure to 1,3-butadiene is associated with more severe hearing loss

Multivariable-adjusted mean values of DHBMA in the hearing loss and high-frequency hearing loss groups. Cr, creatinine; DHBMA, N-acetyl-S-(3,4-dihydroxybutyl)-L-cysteine; HL hearing loss, HFHL high-frequency hearing loss, None non-hearing loss group, mild mild hearing loss group, Mod to Sev moderate to severe hearing loss; *, P < 0.05.