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ID:881 C-peptide creatinine ratio (urine)
Search Links: General Info : Protocols : LabTestsOnline

DescriptionUrine C-peptide is a simple, practical and non-invasive alternative to serum C-peptide measurement which can easily be performed in the outpatient department and primary care setting (McDonald et al. 2009 Clin Chem). A urine sample collected 2 hours after the biggest meal of the day permits assessment of residual beta cell function and is discriminative between type 1 diabetes and other sub-types of diabetes. For more information, see
IndicationAssessment of residual beta cell function in diabetic patients.
Additional InfoThis test should not be confused with urine protein creatinine ratio (PCR)
Concurrent Testsna
Dietary Requirementssee collection conditions
Interpretation<0.2 nmol/mmol creatinine indicates no residual insulin production

DepartmentBlood Sciences
TubeBoric Acid Bottle
Tube Picture
Collection ConditionsSamples should be collected as follows: 1. Pass urine just before your biggest meal of the day and discard. 2. Eat your meal as usual with a glass or more of water. 3. Do not eat or drink anything else for the next 2 hours (unless you become hypoglycaemic in which case you should do this test another day). 4. Do not pass urine until 2 hours after this meal. 5. 2 hours after this meal, please pass some urine into the red-topped pot provided. Screw lid on tightly. 6. Write your name, date of birth, time of sample and time of meal on the bottle. Samples and forms should be labelled with 3 points of patient identification and time relative to prandial stimulation.
Min. Vol

Ref. Range (Male)
Ref. Range (Female)
Ref. Range (Paed)
Ref. Range Notes
Unitsnmol/mmol (creat)
IP Acute TAT7 days
IP Routine TAT7 days
GP Acute TAT- Not Defined -
GP Routine TAT- Not Defined -
Turnround CommentNA

Originally edited by : Robert Barski. Review due on 03/10/2018 10:48:45. Published By dan carless on 03/10/2017 10:48:45.