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Estimated effects of prenatal chlorpyrifos exposure on PDI scores for children 12 to 36 months of age according to race/ethnicity by using GLM repeated-measures analysis of variance. The models were adjusted for race/ethnicity, gender, gestational age, maternal educational level, maternal IQ, HOME score, and ETS exposure. The high chlorpyrifos exposure group includes those with cord blood chlorpyrifos levels >6.17 pg/g, and the low group includes all those with lower levels.
