REN and Hypertension: The median aldosterone concentration was lower compared to patients with normal-renin hypertension and PA: 279 pmol/L (216-355) vs 320 pmol/L (231-472), <i>P</i> < .05 and 419 pmol/L (360-530), <i>P</i> < .001.<h4>Conclusion</h4>At least a quarter of treatment-naïve hypertensive patients in primary care had a low direct renin concentration but did not meet the criteria for PA.