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HelpTest Code CACR Calcium : Creatinine Ratio, urine
Laboratory Code
LAB2416
Specimen Requirements
Specimen Type: Urine
Container/Tube: Urine cup
Volume: 100.0 mL
Minimum Volume: 30.0 mL
Collection Instructions: Fast patient 10 - 12 hours before sample collection. Collect mid-stream urine in preservative-free urine container.
Specimen Stability
| Specimen Type | Urine |
|---|---|
| Ambient | 2 days |
| Refrigerate | 4 days |
| Frozen | 3 weeks |
Methodology
| Calcium, urine | Colorimetry |
|---|---|
| Creatinine, urine | Enzymatic Assay |
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Haemolysis | Not applicable |
|---|---|
| Icterus | Not applicable |
| Lipaemia | Not applicable |
| Others | Not applicable |
Reference Interval
| Age | Male | Female |
|---|---|---|
| 0 – < 1 yrs | ≤ 1.50 mmol/mmol | |
| 1 – < 2 yrs | ≤ 1.25 mmol/mmol | – |
| 1 – 4 yrs | – | ≤ 1.00 mmol/mmol |
| 2 – 4 yrs | ≤ 1.00 mmol/mmol | – |
| 5 – 9 yrs | ≤ 0.70 mmol/mmol | ≤ 0.70 mmol/mmol |
| 10 – 17 yrs | ≤ 0.60 mmol/mmol | ≤ 0.60 mmol/mmol |
| ≥ 18 yrs | 0.04 – 0.45 mmol/mmol | 0.10 – 0.58 mmol/mmol |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluating calcium homeostasis.
Service Code
31407
LOINC Code Information
| Calcium, urine | 2004-0 |
|---|---|
| Creatinine, urine | 14638-7 |
| Calcium : Creatinine ratio, urine | 24518-3 |
Update
Last updated 10/03/2025