Renin Activity, plasma

0 – 2 years: 4.6 ng/mL/hour (mean)* Range: 1.4-7.8 ng/mL/hour
3 – 5 years: 2.5 ng/mL/hour (mean)* Range: 1.5-3.5 ng/mL/hour
6 – 8 years: 1.4 ng/mL/hour (mean)* Range: 0.8-2.0 ng/mL/hour
9 – 11 years: 1.9 ng/mL/hour (mean)* Range: 0.9-2.9 ng/mL/hour
12 – 17 years: 1.8 ng/mL/hour (mean)* Range: 1.2-2.4 ng/mL/hour
 
*Mean data not standardized as to time of day or diet. Infants were supine, children sitting.

Na-depleted, upright (peripheral vein specimen)
18 – 39 years: 10.8 ng/mL/hour (mean) 2.9 – 24.0 ng/mL/hour (range)
> or =40 years: 5.9 ng/mL/hour (mean) 2.9 – 10.8 ng/mL/hour (range)

Na-replete, upright (peripheral vein specimen)
18 – 39 years: 1.9 ng/mL/hour (mean) < or =0.6 – 4.3 ng/mL/hour (range)
> or =40 years: 1.0 ng/mL/hour (mean) < or =0.6 – 3.0 ng/mL/hour (range)