The article on secondary hypertension (Aust Prescr 2021;44:165-9) has been corrected. View corrected article.

There was an error in Table 2 – Factors that may lead to false-positive or false-negative aldosterone:renin ratio results. In the ‘Potassium wasting diuretics’ line, the arrow in the ‘Effect on aldosterone:renin ratio’ column should point down (not up), indicating a false negative.