A Comparison of exposure and methylation variables between workers and controls, Median (IQR).

Abbreviations: SPMA, S-phenylmercapturic acid; t,t-MA, Trans-trans-muconic acid.Data were missing and excluded in the analysis for the following variables: SPMA (10 individuals), t,t-MA (7 individuals), Alu (14 individuals), LINE-1 (15 individuals), MAGE (16 individuals) and p15 (28 individuals).*PaAll exposure and outcome variables are expressed as minimum (Min), 25th quantile (p25), median (IQR), 75th quantile (p75), maximum (Max).bP-values were obtained from Wilcoxon’s rank sum test.cAlmost all controls (49/50) have values less than LOD of 0.023 ppm and were assigned a value corresponding to half of LOD in the analysis (i.e. 0.012 ppm).dA majority of the controls (33/50) have values less than LOD of 50 µg/L and were assigned a value corresponding to half of LOD in the analysis (i.e. 25 µg/l).