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Table 3 Percentiles of weight difference, absolute weight difference, parcentage error and absolute percentage error for weight estimates performed by midwives at a University Hospital in Beirut

From: Accuracy of clinical fetal weight estimation by Midwives

 

Percentiles

 

5th

10th

25th

50th

75th

90th

95th

Weight difference (gm)

−673

−533

−330

−85

151

353

506

Absolute weight difference

13.5

38.8

100

222.5

390

593

720

Percent error

−17.9%

−14.3%

−9.6%

−2.6%

5.1%

12.8%

18.0%

Absolute percent error

0.4%

1.2%

3.1%

7.1%

12.7%

17.9%

22.5%

  1. Weight difference is defined as estimated weight—Birth weight, Absolute weight difference is the absolute value of the weight difference. Percent error is defined as (Estimated weight—Birth weight)*100/Birth Weight. Absolute percent error is the absolute value of the percent error