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. Author manuscript; available in PMC: 2021 Jul 1.
Published in final edited form as: Stat Methods Med Res. 2019 Sep 23;29(7):1769–1786. doi: 10.1177/0962280219876963

Figure 1:

Figure 1:

Left: head circumference (HC) vs birthweight (BW). The horizontal and vertical dashed lines mark, respectively, the estimated 10th percentile of HC and BW at age 162 days, and divide the plane into four quadrants numbered I to IV. Right: HC-to-BW ratio vs gestational age. Superimposed solid lines represent smoothing splines predictions.