TABLE 2.

Accuracy of Different Cortisol Measures

Cortisol measure	Sample size	AUC	95% CI	P value
Preoperative	128	.61	.45-.77	.20
RR	101	.92	.85-.99	<.001
Day 1 AM	142	.84	.72-.95	<.001
Day 2 AM	127	.81	.67-.95	<.001
Day 3 AM	78	.70	.46-.94	.037
In patients with both RR and day 1 a.m. values
RR	95	.92	.84-1.00	<.001
Day 1 a.m.	95	.85	.69-1.00	<.001

AUC, area under the curve; CI, confidence interval.