Table 2.

Differences of urinary 1-OH-PYR and 2-OH-PH in three occupational groups^a

PAH metabolites	Occupational groups	Adjusted mean (95%CI)	β (95% CI)	p
ln(1-OH-PYR)	Conventional asphalt workers	−2.6 (− 2.8, − 2.4)	0.76 (0.54, 0.97)	< 0.001
	CRM asphalt workers	−2.5 (− 2.8, − 2.3)	0.85 (0.58, 1.1)	< 0.001
	Control	−3.4 (− 3.6, − 3.2)	0	–
ln(2-OH-PH)	Conventional asphalt workers	−1.6 (− 1.8, − 1.5)	0.58 (0.36, 0.79)	< 0.001
	CRM asphalt workers	−1.6 (− 1.9, − 1.4)	0.58 (0.31, 0.85)	< 0.001
	Control	−2.2 (− 2.4, − 2.0)	0	–

^aAdjusted mean, β estimates and p values were derived from linear mixed model after adjusting for age, BMI, smoking and snus status, cigarette pack-year and investigation season. The controls are the reference group