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Table 3 The technical error of measurements of CRL and MSD of women between 6 and 10 weeks of gestation in Mulago Hospital, Kampala, 2016

From: Measurement error of mean sac diameter and crown-rump length among pregnant women at Mulago hospital, Uganda

Paired set of measurements

Absolute TEM*

VAV*

Relative TEM* (%)

Classification

Intra-observer variation (CRL*)

 Observer 1

0.72

15.54

4.62

Acceptable

 Observer 2

0.58

15.81

3.70

Acceptable

Inter-observer variation

 CRL*

0.92

15.66

5.88

Acceptable

 MSD*

1.74

29.36

5.93

Acceptable

  1. *TEM Technical error of measurement, *VAV Variable average value, *CRL Crown-rump length, *MSD Mean sac diameter