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. Author manuscript; available in PMC: 2020 Jul 22.

Published in final edited form as: Environ Int. 2019 Dec 13;135:105381. doi: 10.1016/j.envint.2019.105381

Predicted temporal trends of log-transformed n-PFOA, n-PFOS, sm-PFOS, PFHxS and PFNA serum concentrations at SWAN V03 (1999/2000), V06 (2002/2003), V09 (2005/2006) and V12 (2009/2011), stratified by race/ethnicity, menstruation status and parity, adjusting for age at baseline, study site and body mass index at baseline, based on fixed effects estimated from mixed regression models. Abbreviations: n-PFOA, linear-chain perfluorooctanoic acid; PFNA, perfluorononanoic acid; PFHxS, perfluorohexane sulfonic acid; n-PFOS, linear-chain perfluorooctane sulfonic acid; sm-PFOS, sum of branched-chain perfluorooctane sulfonic acid.

Predicted temporal trends of log-transformed n-PFOA, n-PFOS, sm-PFOS, PFHxS and PFNA serum concentrations at SWAN V03 (1999/2000), V06 (2002/2003), V09 (2005/2006) and V12 (2009/2011), stratified by race/ethnicity, menstruation status and parity, adjusting for age at baseline, study site and body mass index at baseline, based on fixed effects estimated from mixed regression models. Abbreviations: n-PFOA, linear-chain perfluorooctanoic acid; PFNA, perfluorononanoic acid; PFHxS, perfluorohexane sulfonic acid; n-PFOS, linear-chain perfluorooctane sulfonic acid; sm-PFOS, sum of branched-chain perfluorooctane sulfonic acid.