From 10/5/2018 refernce ranges will be:
100 - 460 umol/24 hour (adults, correct to 1.73m2for children)
Age related ref ranges for oxalate:creatinine ratio:
0-6 months <291µmol/mmol
7-23 months <220µmol/mmol
2-4 years <143µmol/mmol
5-11 years <76µmol/mmol
12 -17 years <44µmol/mmol
18+ female <45µmol/mmol
18+ male <33µmol/mmol