Inter- and intra-observer variability in Sonographic measurements of the cross-sectional diameters and area of the umbilical cord and its vessels during pregnancy

Table 2 Inter-observer variability in the ultrasonographic measurements of the umbilical cord (n = 221)

Characteristics	Mean Difference (SD)	95%CI	p*	R	ICC	Crombach's alpha
Diameter of the cord (mm)	0.024 (1.208)	(-0.136; 0.185)	0.896	0.90	0.94	0.97
Diameter of the artery (mm)	-0.057 (0.677)	(-0.147; 0.032)	0.728	0.79	0.83	0.91
Diameter of the vein (mm)	0.045 (0.907)	(-0.075; 0.166)	0.800	0.90	0.91	0.95
Area of the cord (mm²)	1.088 (30.120)	(-2.905; 5.081)	0.903	0.90	0.92	0.96

ISSN: 1742-4755