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Bland-Altman Plots: (A) Ages and Stages Questionnaire and Preschool Language Scale [95% limits of agreement: -1.75 to 1.73]; (B) Sure Start Language Measure and Preschool Language Scale [95% limits of agreement: -1.80 to 1.80]; (C) Ages and Stages Questionnaire and Sure Start Language Measure [95% limits of agreement: -1.52 to 1.53].
