Figure 1.
(Panel A) Urinary mutagenicity levels among female non-smokers who used particularly carcinogenic Laibin smoky coal or smokeless coal in the 1993 community-based cross-sectional study in Xuanwei, China. Differences between exposure groups were tested with unadjusted and age-adjusted linear regression models. Exposure-response relationships between urinary mutagenicity and air 5-methylchrysene (5MC) (Panel B) and benzo[a]pyrene (B[a]P) (Panel C). Associations were tested with unadjusted and age-adjusted linear regression models.