The serum cortisol cut-off level of 50 nmol/L in the overnight 1 mg dexamethasone suppression test has very high sensitivity and can be used as a screening test for Cushing syndrome.

• 在过夜1mg地塞米松抑制试验中,以次日晨8：00血清皮质醇50nmol/L为切点具有较高的敏感性,可作为库欣综合征的第一线筛选试验。