Table 4.

Area under the receiver operating characteristic curve (AUROC) for calcium excretion of 24 h of urine

AUROC*	Standard error	Significance level p (area = 0.5)	95 % confidence interval
			Lower limit	Upper limit
0.869	0.0476	<0.0001	0.757a	0.943

^aBinomial exact; Z value 7.760

* The ideal test would have an AUROC of 1, whereas a random guess would have an AUROC of 0.5