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The change of the five domains in ASQ from year one to year three. The boxplots illustrate the comparison of the five ASQ measures and their sum score across the first three years of life, with grey lines connecting the same individual. ASQ-Y1 (orange boxes) refers to the ASQ at year one, ASQ-Y2 (green boxes) refers to the ASQ at year two, and ASQ-Y3 (blue boxes) refers to the ASQ at year three.
