Antenatal Ultrasonographic Anteroposterior Renal Pelvis Diameter Measurement: Is It a Reliable Way of Defining Fetal Hydronephrosis?

Table 2

The interrater reliability for antenatal hydronephrosis diagnosis of 50 anteroposterior renal pelvis diameter measurements.

		Hydronephrosis (observer 1)				Total
		Absent	Mild	Moderate	Severe
Hydronephrosis (observer 2)	Absent	6	5	0	0	11
	Mild	6	9	1	0	16
	Moderate	1	4	9	0	14
	Severe	0	0	1	8	9
	Total	13	18	11	8	50

Linear weighting Cohen's Kappa: 0.51 (0.33 to 0.69).