Student Competency for Midtrimester Obstetrics Scan upon Completion of the Master’s Degree in Medical Sonography

Table 3

Comparison of the biometric measurements performed by the sonographer students and the obstetricians.

	Obstetricians	Mean difference	value	Mean difference		value
	(n = 80)			Sonographer 1	Sonographer 2
BPD (mm ± SD)	47.92 ± (3.89)	0.39 ± (1.94)	0.07	0.37 ± (1.95)	0.44 ± (1.95)	0.78
HC (mm ± SD)	180.54 ± (13.66)	4.08 ± (5.88)	<0.001	3.48 ± (5.64)	6.32 ± (6.37)	0.20
AC (mm ± SD)	157.35 ± (14.66)	2.86 ± (7.23)	<0.001	2.24 ± (6.77)	5.13 ± (8.58)	0.14
FL (mm ± SD)	33.77 ± (3.53)	0.12 ± (1.73)	0.94	0.25 ± (1.39)	1.50 ± (2.14)	<0.001
Estimated GA by ultrasound (days ± SD)	20 w4 d ± (8.05)	0.01 d ± (2.92)	0.89	0.20 ± (2.81)	0.64 ± (3.31)	0.39