Primary aldosteronism: Aldosterone/renin ratio cut-off points.

Introduction: Primary aldosteronism (PA) is the most common cause of endocrine hypertension, with a prevalence rate of 6-12% in hypertensive patients. Aldosterone/renin ratio (ARR) is the screening test of choice for PA. Because of the variable cut-off points of ARR, reference values related to the populations and methods considered are recommended.