Second, when the indicator of chronic exposure (i.e., the total percentage of secondary and connecting roads near a child’s home address) was further controlled in adjusted model, the effects of BC on IL4 CpG−48 measured 5 days later was replicated (RR [95% CI] 0.76 [0.61–0.95]; p = 0.017). This evidence concerns the gene IL4 and breast cancer.