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    C-Reactive Protein (CRP)

    C-Reactive Protein (CRP)



    Results

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

    Normal

    The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what’s normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.

    Results are usually available within 24 hours.

    C-reactive protein (CRP) Reference 1
    Normal:

    Less than 1.0 Reference milligram per deciliter Opens New Window (mg/dL) or less than 10 Reference milligrams per liter Opens New Window (mg/L)

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

    Some medicines may decrease your CRP levels.

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

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

    High-sensitivity C-reactive protein (hs-CRP) measures very low amounts of CRP in the blood. This test may help find your risk of heart problems, especially when it is considered along with other risk factors such as cholesterol, age, blood pressure, and smoking. It may be done to find out if you have an increased chance of having a sudden heart problem, such as a Reference heart attack Opens New Window. But the connection between high CRP levels and heart disease risk is not understood very well.

    High-sensitivity C-reactive protein (hs-CRP) level Reference 1
    Normal:

    Less than 0.1 mg/dL or less than 1 mg/L

    hsCRP level and heart disease risk Reference 2

    Less than 1.0 mg/L

    Low risk

    1.0 to 3.0 mg/L

    Average risk

    More than 3.0 mg/L

    High risk



    By: Reference Healthwise Staff Last Revised: Reference March 7, 2012
    Medical Review: Reference Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology
    Reference George Philippides, MD - Cardiology


    This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Reference Terms of Use. Reference How this information was developed to help you make better health decisions.


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