Occupational exposure to asphalt mixture during road paving is related to increased mitochondria DNA copy number: a cross-sectional study

Table 3 Differences of changes (Δ) in urinary 1-OH-PYR and 2-OH-PH between conventional and CRM asphalt paving in the repeated-measures analysis (N = 31)^a

ΔPAH metabolites	Type of asphalt paving	Adjusted mean (95%CI)	β (95% CI)	p
Δln(1-OH-PYR)	Conventional asphalt paving	0.86 (0.56, 1.2)	0	–
Δln(1-OH-PYR)	CRM asphalt paving	0.86 (0.57, 1.2)	0.0068 (−0.37, 0.38)	0.97
Δln(2-OH-PH)	Conventional asphalt paving	0.88 (0.62, 1.1)	0	–
Δln(2-OH-PH)	CRM asphalt paving	0.38 (0.13, 0.62)	−0.50 (−0.85, − 0.15)	0.0073

^aAdjusted mean, β estimates and p values were derived from linear mixed model after adjusting for pre-working PAH metabolites levels. Conventional asphalt paving are the reference group

ISSN: 1476-069X