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Urine Protein-to-Creatinine Ratio — Qualitative Test Strip

Published: August 9, 2026Updated: August 16, 2026

A urine test strip that estimates the amount of protein relative to creatinine, helping screen for abnormal urinary protein loss.

Quick summary

["This test helps detect and monitor protein loss in the urine, which can be a sign of kidney disease."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
98121-7
Short code
Prot/Creat Ur Ql Strip
Synonyms
Prot/Creat Ur Ql Strip
Category
kidney
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
test-strip
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What is this test?

A urine protein-to-creatinine ratio compares the amount of protein in your urine with the amount of creatinine. A test strip provides a qualitative or estimated result and may be used to screen for abnormally high urinary protein levels.

Why might I need this test?

This test may be ordered to screen for or monitor kidney conditions, particularly if you have diabetes, high blood pressure, or an illness that may affect the kidneys. It can also help evaluate protein in the urine during pregnancy when clinically appropriate.

How is the test performed?

A urine sample is collected and tested with a reagent strip. The strip changes color according to the amount of protein and creatinine detected, and the result is interpreted qualitatively or as an estimated range.

How do I prepare for the test?

Follow your healthcare professional's instructions about when and how to collect the urine sample. Collect it in the provided clean container and avoid contaminating it with toilet paper, cleaning products, or other substances.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine protein/creatinine ratio

Frequently asked questions

Does this test diagnose kidney disease?
No. It screens for increased urinary protein, which can be associated with kidney disease, but other tests are needed to determine the cause and confirm a diagnosis.
Why are protein and creatinine compared?
Creatinine is produced by the body at a fairly steady rate, so comparing it with urine protein helps reduce the effect of urine concentration. A very dilute or concentrated sample can still affect interpretation.
Does drinking extra water affect the result?
It can, because changes in urine concentration may influence the ratio. Follow the collection instructions provided by your healthcare professional.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy