Table 3. The AUCs of the ROC curves for the nomogram and variables from the logistic regression model in the development group and validation group.

	Development group			Validation group
	AUC	95%CI	P value	AUC	95%CI	P value
Nomogram variable	0.914	0.88~0.95	<0.001	0.874	0.80~0.95	<0.001
Gender	0.676	0.61~0.74	<0.001	NA
Functional solitary kidney	0.582	0.50~0.66	0.032	NA
Mean CT attenuation value of hydronephrosis	0.647	0.57~0.73	<0.001	NA
Urine WBC count	0.863	0.82~0.90	<0.001	NA
Urine nitrite	0.634	0.55~0.72	<0.001	NA

ROC, receiver operating characteristic; AUC, area under the curve; CI, confidence interval.