MBP and endometriosis: In contrast, urine concentrations of MBP (SMD 0.20, 95% CI 0.07–0.32; p <0.05), MEOHP (SMD 0.29, 95% CI 0.04–0.53; p <0.05), and MEHHP (SMD 0.34, 95% CI 0.07–0.61; p <0.05) were significantly higher in the endometriosis group compared to the control group (Figure 2).