For a brief introduction and guide to abbreviations, see Laboratory Tests: General Remarks.
Reference range, target level, or decision threshold
[S/P] 138-690 nmol/L (5-25 microg/dL) in the morning
[U] 220-330 nmol/24 h (80-120 microg/24 h) (depending on method)
[SA] 0.3-4.3 nmol/L (10.9-156 ng/dL) in late evening
Interpretation of results
↑ Overactive adrenal glands (usually Cushing syndrome)
↓ Adrenal insufficiency