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Table 2 Percent error of EFW to actual BW for different categories of BW

From: Percent error of ultrasound examination to estimate fetal weight at term in different categories of birth weight with focus on maternal diabetes and obesity

Percentage error of EFW to BW
BW N Mean ± SD CI
< 2500 g 278 5.11 ± 10.95 3.81—6.40
2500 g-2749 g 519 3.89 ± 10.27 3.01—4.78
2750 g-2999 g 1054 2.40 ± 9.10 1.85—2.95
3000 g-3249 g 1883 0.28 ± 8.45 -0.10—0.66
3250 g-3499 g 2346 -1.55 ± 8.17 -1.89 -(-1.22)
3500 g-3749 g 2027 -3.83 ± 7.84 -4.17 -(-3.49)
3750 g-3999 g 1548 -6.15 ± 7.56 -6.52 -(-5.77)
4000 g-4249 g 830 -7.28 ± 7.72 -7.80 -(-6.75)
4250 g-4499 g 355 -9.57 ± 7.45 -10.35 -(-8.73)
> 4500 g 209 -12.44 ± 7.97 -13.53 -(-11.36)
p-value c  < 0.001
  1. cOneway ANOVA