The detection rate of trans-DCCA and 3-PBA in the CBT group urine samples was markedly higher (85.7% and 91.3%, respectively) than those in the control group urine samples (75.9% and 82.9%, respectively) (both p = 0.02). The detection rate of cis-DCCA tended to be higher in the CBT group (73.9% vs. 68.2%) than in the control group, but with no significant difference (p = 0.26).