Urine protein on a screening report is a starting signal, not a diagnosis of chronic kidney disease from one positive test. A dipstick result, a urine albumin-to-creatinine ratio (ACR or UACR), and blood-based eGFR answer different questions. Identify the specimen and test method before comparing numbers.
Three different tests
| Report term | Sample | What it describes |
|---|---|---|
| 요단백 / urine protein | Urine | A strip or similar test for protein, sometimes reported as negative, positive or graded. |
| Urine ACR or UACR | Urine | Albumin relative to urine creatinine; read the ratio unit, often mg/g. |
| Serum creatinine / eGFR | Blood | Another aspect of kidney assessment, based on blood results. |
If the protein test is positive
Ask whether the finding is transient or persistent. Tell your clinician about fever, infection, strenuous exercise, dehydration, menstruation and the circumstances of collection, since context or contamination may matter. A routine strip may miss small amounts of albumin; ask whether a quantitative urine ACR and repeat testing would clarify the result. This page cannot decide the timing for an individual.
Does a negative dipstick rule out kidney disease?
No. A negative routine protein strip does not exclude all kidney conditions. If you have diabetes, high blood pressure or previous abnormal results, discuss whether eGFR and ACR are appropriate. Our ACR calculator requires measured albumin and creatinine from the same urine specimen, with the correct units; do not invent missing values.
Questions for a visit
- Was this a dipstick protein result or a quantitative urine ACR?
- Should the test be repeated or paired with ACR and eGFR, and when?
- Could specimen collection or a temporary condition have changed the result?
Continue to the creatinine and eGFR guide, the urine ACR calculator and the lab results log.
Sources and review
- Korea National Rehabilitation Center: screening scope
- US National Library of Medicine: Protein in Urine
- US NIDDK: Assess Urine Albumin
General information, not an individual diagnosis or medicine adjustment. No independent specialist review was performed. Editorial check: September 27, 2026.