Introduction: The aim of this study was the comparison of 24h urine free cortisol (UFC), serum cortisol at 11pm (SCM) and late-night salivary cortisol (LSC) in patients suspected for hypercortisolism, and an assessment of the usefulness of these measurements in diagnosing overt Cushing's (OCS) syndrome, pseudo Cushing's state (PCS) and subclinical Cushing's syndrome (SCS).
Material and methods:The study group consisted of 82 patients, of whom four patients had SCS, three OCS and eight PCS. For measurements of LSC, the ELISA method was used, and for UFC and SCM determination, chemiluminescent microparticle immunoassay was used.