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The home language environment at 9-months (panel A and C) and 15-months (panel B and D) is significantly associated with later language skills at 24 months, after controlling for clinical data collection site, maternal education, and sex of the infant. Dotted lines represent regression lines for each group (HR-ASD in red, HR-Neg in blue, and LR-Neg in green). Bold line is the model fit regression line across all infants.
