<unk>  can be given in ng/dL per ng/(mL·h), that is, nanogram per deciliter of<unk>  per nanogram per (milliliter x hour) of renin. Also, it can be given in pmol/L per µg/(L·h), where<unk>  is given in molar concentration. The former can be converted to the latter by multiplying by 27.6. Also, the inverse value is occasionally given, that is, the renin-to-aldosterone ratio, whose value is the multiplicative inverse of the<unk> . The cutoff normal individuals from those with primary hyperaldosteronism is significantly affected by the conditions of testing, such as posture and time of day. On average, an<unk>  cutoff of 23.6 ng/dL per ng/(mL·h), expressed in alternative units as 651 pmol/L per µg/(L·h), has been estimated to have a sensitivity of 97% and specificity of 94%. An<unk>  value in an individual that is higher than the cutoff indicates primary hyperaldosteronism. If the inverse ratio (i.e. renin-to-aldosterone) ratio is used, a value lower than the cutoff indicates primary hyperaldosteronism. + Cutoffs used to distinguish primary hyperaldosteronism from normal individuals<unk>  Renin-to-aldosterone ratio Value Unit Value Unit 13.1, 23.6, 35.0 ng/dL per ng/(mL·h) 0.029, 0.042, 0.076 ng/(mL·h) per ng/dL 362, 651, 966 pmol/L per µg/(L·h) 0.0010, 0.0015, 0.0028 µg/(L·h) per pmol/L
Aldosterone-to-renin ratio
Plasma renin activity
Captopril suppression test
Renal clearance ratio
Fractional excretion of sodium
Urine osmolality
Urine urea nitrogen
Ventricular natriuretic peptide