Table 3.

Sensitivity, specificity, percentage of correctly classified patients and positive and negative likelihood ratio of basal cortisol at different cut off values

Cut-off value of basal cortisol	Sensitivity	Specificity	Correctly classified	LR+	LR-
<150 nmol/l	100%	50%	74%	2.0	0.0
<330 nmol/l	80%	86%	83%	5.6	0.2
>400 nmol/l	56%	96%	77%	15.7	0.5

LR+ = positive likelihood ratio, LR- = negative likelihood ratio