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. Author manuscript; available in PMC: 2023 Mar 2.
Published in final edited form as: NEJM Evid. 2022 Mar 28;1(5):10.1056/evidoa2100058. doi: 10.1056/evidoa2100058

Figure 3. Model Versus Biometry and LMP in the Novice Test Set.

Figure 3.

a dashed horizontal lines represent expected error bounds of ultrasound biometry according to the American College of Obstetricians and Gynecologists.4 b data missing from 22 participants who could not recall their LMP c 13 studies from GA by LMP excluded from the plot because the absolute error is truncated at 49 days In Zambia, “ground truth” gestational age is defined by the first ultrasound. GA denotes gestational age and LMP last menstrual period.