C-Reactive Protein (CRP)

CRP (C-reactive Protein)

Results

A C-reactive protein (CRP) test is a blood test that measures the amount of a protein called C-reactive protein in your blood.

Normal

Normal values may vary from lab to lab. Results are usually available within 24 hours.

C-reactive protein (CRP)

Normal:	0–1.0 mg/dL or less than 10 mg/L (SI units)

Any condition that results in sudden or severe inflammation may increase your CRP levels.

Some medicines may decrease your CRP levels.

High-sensitivity C-reactive protein (hs-CRP) levels

The hs-CRP test measures your risk for heart problems. It may be done to find out if you have an increased chance of having a sudden heart problem, such as a heart attack. However, the connection between high CRP levels and heart attack risk is not very well-understood.

High-sensitivity C-reactive protein (hs-CRP) levels

Less than 1.0 mg/dL	Lowest risk
1.0 to 3.0 mg/dL	Average risk
More than 3.0 mg/dL	Highest risk

 

Many conditions can change CRP levels. Your doctor will talk with you about any abnormal results that may be related to your symptoms and medical history.

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Author:	Robin Parks, MS	Last Updated: March 26, 2008
Medical Review:	E. Gregory Thompson, MD - Internal Medicine George Philippides, MD - Cardiology
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