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Participants who passed or failed the low-dose suppression test at 30 and 60 minutes using a cortisol level cutoff ≥18 μg/dL at either time point to indicate adrenal sufficiency. White = cortisol levels <18 μg/dL at both time points; striped = cortisol levels ≥18 μg/dL at 60 minutes only; gray = cortisol levels ≥18 μg/dL at both 30 and 60 minutes; black = cortisol levels ≥18 μg/dL at 30 minutes and <18 μg/dL at 60 minutes.
