Amelia K Wesselink1, Jennifer Weuve2, Victoria Fruh3, Traci N Bethea4, Birgit Claus Henn3, Quaker E Harmon5, Russ Hauser6, Paige L Williams7, Antonia M Calafat8, Michael McClean3, Donna D Baird5, Lauren A Wise2. 1. Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts. Electronic address: akw23@bu.edu. 2. Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts. 3. Department of Environmental Health, Boston University School of Public Health, Boston, Massachusetts. 4. Lombardi Comprehensive Cancer Center, Georgetown University, Washington, D.C. 5. Epidemiology Branch, National Institute of Environmental Health Sciences, Durham, North Carolina. 6. Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts. 7. Department of Biostatistics, Harvard T. H. Chan School of Public Health, Boston, Massachusetts. 8. National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia.
Abstract
OBJECTIVE: To examine the association of urinary concentrations of phenols, parabens, and triclocarban with incidence and growth of uterine leiomyomata (UL; fibroids). DESIGN: Case-cohort study, nested within the Study of Environment, Lifestyle, and Fibroids, a prospective cohort study. SETTING: Clinic visits at baseline and every 20 months for 60 months. PATIENT(S): 754 Black women aged 23-35 years residing in the Detroit, Michigan area (enrolled during 2010-2012). INTERVENTION: None. MAIN OUTCOME MEASURE(S): At each study visit, women underwent transvaginal ultrasound for measurement of UL incidence and growth and provided urine specimens in which we quantified concentrations of seven phenols, four parabens, and triclocarban. We used Cox proportional hazards regression to estimate hazard ratios and 95% confidence intervals (CIs) characterizing the relation of urinary biomarker concentrations with UL incidence during the 60 months of follow-up. In a subset of UL detected and measured at multiple time points, we used linear regression to assess the associations between biomarker concentrations and UL growth. RESULT(S): Urinary biomarker concentrations were generally inversely associated with UL incidence, but the associations were weak and nonmonotonic. For example, hazard ratios comparing concentrations ≥90th with <50th percentile were 0.77 (95% CI: 0.46, 1.27) for bisphenol A, 0.72 (95% CI: 0.40, 1.28) for bisphenol S, and 0.76 (95% CI: 0.43, 1.33) for methylparaben. Biomarker concentrations were not strongly associated with UL growth. CONCLUSION(S): In this study of reproductive-aged Black women, urinary phenols, parabens, and triclocarban biomarkers were neither strongly nor consistently associated with UL incidence and growth.
OBJECTIVE: To examine the association of urinary concentrations of phenols, parabens, and triclocarban with incidence and growth of uterine leiomyomata (UL; fibroids). DESIGN: Case-cohort study, nested within the Study of Environment, Lifestyle, and Fibroids, a prospective cohort study. SETTING: Clinic visits at baseline and every 20 months for 60 months. PATIENT(S): 754 Black women aged 23-35 years residing in the Detroit, Michigan area (enrolled during 2010-2012). INTERVENTION: None. MAIN OUTCOME MEASURE(S): At each study visit, women underwent transvaginal ultrasound for measurement of UL incidence and growth and provided urine specimens in which we quantified concentrations of seven phenols, four parabens, and triclocarban. We used Cox proportional hazards regression to estimate hazard ratios and 95% confidence intervals (CIs) characterizing the relation of urinary biomarker concentrations with UL incidence during the 60 months of follow-up. In a subset of UL detected and measured at multiple time points, we used linear regression to assess the associations between biomarker concentrations and UL growth. RESULT(S): Urinary biomarker concentrations were generally inversely associated with UL incidence, but the associations were weak and nonmonotonic. For example, hazard ratios comparing concentrations ≥90th with <50th percentile were 0.77 (95% CI: 0.46, 1.27) for bisphenol A, 0.72 (95% CI: 0.40, 1.28) for bisphenol S, and 0.76 (95% CI: 0.43, 1.33) for methylparaben. Biomarker concentrations were not strongly associated with UL growth. CONCLUSION(S): In this study of reproductive-aged Black women, urinary phenols, parabens, and triclocarban biomarkers were neither strongly nor consistently associated with UL incidence and growth.
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