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Urine Protein-to-Creatinine Ratio (UPCR) or Urine Protein-to-Creatinine Ratio (qualitative screening)

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

This test measures the ratio of protein to creatinine in your urine to help detect early kidney damage or protein loss in the urine.

Quick summary

["Early kidney issues may show up as higher protein levels in urine relative to creatinine, even when urine appears clear."]

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

Key facts at a glance

LOINC
53132-7
Short code
Non-sq Epi Cells #/area UrnS LPF
Synonyms
Non-sq Epi Cells #/area UrnS LPF
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
microscopy-light-lpf
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 This Test Measures

The test compares the amount of protein (often albumin) to creatinine—a waste product from muscle breakdown—present in your urine. Creatinine levels are stable and reflect kidney function, while protein levels can indicate kidney damage or conditions like diabetes or high blood pressure.

Why It’s Done

Your doctor may order this test if you have symptoms like swelling, frequent urination, or unexplained weight changes, or if you have risk factors like diabetes, high blood pressure, or a family history of kidney disease.

When to Expect Results

Results are typically available within 1–3 business days, depending on your lab. High ratios may prompt further testing, like a 24-hour urine protein test or kidney function blood tests.

Common Conditions Monitored

This test helps identify conditions like **nephrotic syndrome** (excess protein loss), **diabetic nephropathy** (kidney damage from diabetes), or **glomerular diseases** (filtering issues in kidneys). It’s also used to monitor chronic kidney disease progression.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Urine Protein-to-Creatinine Ratio (UPCR) Screening

Frequently asked questions

Why might my doctor ask for this test?
Your doctor may recommend it to check for early kidney problems, especially if you have symptoms like swelling in your legs, foamy urine, or high blood pressure. It’s also useful for people with diabetes or heart disease, as these conditions can strain kidney function.
What does a high or low result mean?
A higher-than-normal ratio may signal kidney damage or protein loss, while a very low ratio could indicate dehydration or kidney disease in advanced stages. Your doctor will interpret results in the context of your overall health.
How is the test done?
You’ll provide a urine sample (usually a random sample) in a clean container. No special preparation is needed, but avoid strenuous activity or certain foods (like large amounts of salt or protein) 24 hours before testing if instructed.
  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