Traffic B[a]P exposure in 1995 (top 5% vs. below the median) was more strongly associated with ER–/PR– breast tumors (OR = 1.67; 95% CI: 0.91, 3.05), rather than ER+/PR+, ER+/PR–, or ER–/PR+ tumors (OR = 0.80; 95% CI: 0.50, 1.27; ratio of the ORs = 2.09; 95% CI: 1.08, 4.06) (Table 4). Here, PGR is linked to breast neoplasm.