Plasma Reference Intervals:
Male >12 years 11.0-22.0 umol/L
Female >12 years 12.6-24.3 umol/L
<6 months 3.1-11.0 umol/L
6 months – 6 years 14.1-29.8 umol/L
6 years – 12 years 12.6-25.1 umol/L
Source: Tietz 4th Ed 2006