Urine Protein-to-Creatinine Ratio (24-hour collection)

Why This Test Is Done

Your doctor may order this test if you have symptoms like swelling, frequent urination, or unexplained weight changes. It’s also used to monitor kidney disease, high blood pressure, or diabetes-related kidney problems. Some people with conditions like glomerulonephritis or nephrotic syndrome may need this test to track how well their kidneys are working.

How the Test Works

You’ll collect all your urine for a full 24-hour period in a special container. The urine is then sent to a lab, where protein and creatinine levels are measured separately. The ratio helps doctors determine if protein is being lost in your urine at a rate that might harm your kidneys.

Sample Collection Process

To collect urine for this test, start by emptying your bladder completely at the beginning of the 24-hour period (often midnight). Then, collect every bit of urine you pass afterward, including during sleep. Store the urine in a cool, dark place. At the end of 24 hours, measure the total urine volume and combine it all. Bring the container to your doctor’s office or lab for testing.

What to Expect After the Test

After collecting your urine, you’ll likely return to normal activities. There are no special restrictions, but you may want to avoid heavy exercise or strenuous activity that could affect your urine output. Most people don’t experience any side effects, but drinking extra water may help dilute your urine if needed.