Difference [95% confidence interval (CI)] in BASC-2 SRP internalizing symptom T-scores associated with a doubling of each chemical, among New Bedford Cohort participants. Models adjusted for parental and household characteristics (prenatal social disadvantage index score; maternal age at birth; prenatal smoking; seafood, alcohol intake during pregnancy; maternal IQ; Home Observation for Measurement of the Environment score at 15-year assessment), child characteristics (sex, race/ethnicity, age at BASC-2 SRP), and the other chemicals; no sex-chemical interaction terms had p-values <0.05. Abbreviations: BASC-2 SRP, Behavior Assessment System for Children, Second Edition, Self-Report of Personality; DDE, p,p'-dichlorodiphenyl dichloroethylene; HCB, hexachlorobenzene; Pb, lead; PCB4, sum of four polychlorinated biphenyl congeners; Mn, manganese.