Normal Values:

Normal CRP values vary from lab to lab. Generally, there is no CRP detectable in the blood.

Your doctor may also use a highly sensitive test called hs-CRP to help determine your risk of heart disease. According to the American Heart Association:

• You are at low risk of developing cardiovascular disease if your hs-CRP level is lower than 1.0mg/L
• You are at average risk of developing cardiovascular disease if your levels are between 1.0 and 3.0 mg/L
• You are at high risk for cardiovascular disease if your hs-CRP level is higher than 3.0 mg/L

Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.

What abnormal results mean:

A positive test means you have inflammation in the body. This may be due to a variety of different conditions, including:

• Cancer
• Connective tissue disease
• Heart attack
• Infection
• Inflammatory bowel disease (IBD)
• Lupus
• Pneumococcal pneumonia
• Rheumatoid arthritis
• Rheumatic fever
• Tuberculosis

This list is not all inclusive.

Note: Positive CRP results also occur during the last half of pregnancy or with the use of birth control pills (oral contraceptives).