Table 3.

Mean % change in cortisol level according to clinical presentation.

Clinical presentation	Mean % change in cortisol level
	30 min & basal	60 min & basal	60 min & 30 min	P value
Overall	130.6 ± 21.7	174.2 ± 26.9*	20.7 ± 3.5*,†	<.001
Clinical presentation
Known AI (N = 13)	146.4 ± 52.0	191.5 ± 64.5*	16.7 ± 8.3*,†	<.05
Suspected AI (N = 141)	145.6 ± 15.9	193.6 ± 19.8*	20.4 ± 2.5*,†	<.001
P value	.99	.98	.67
Steroid use
Yes (N = 64)	145.2 ± 23.7	198.2 ± 29.3*	20.4 ± 3.7*,†	<.001
No (N = 90)	146.0 ± 20.0	190.0 ± 24.7*	19.8 ± 3.2*,†	<.001
P value	.98	.83	.89

% change is calculated by dividing the change (from basal) in cortisol by basal value & × 100. Data presented as mean ± SE.

AI = adrenal insufficiency.

^* and

^† indicate significant difference from basal and 30 minutes. P < .05 considered significant.