What is the normal reference range for CRP?

CRP usually refers to C-reactive protein. Generally, the normal value of C-reactive protein is <2.87 mg/L for adults and children, ≤47 mg/L for pregnant women, ≤0.6 mg/L for newborn cord blood, and ≤1.6 mg/L for infants aged 4 days to 1 month. A detailed analysis is as follows:

C-reactive protein normal values vary among different populations. For adults and children, it is usually <2.87 mg/L, for pregnant women ≤47 mg/L, for newborn cord blood ≤0.6 mg/L, and for infants aged 4 days to 1 month ≤1.6 mg/L. These values serve as important references for determining whether inflammation, infection, or other abnormalities exist in the body. When measured values exceed the corresponding ranges, it may indicate bacterial infections, tissue damage, chronic inflammation, or other issues. For example, elevated levels in adults may be associated with pneumonia or arthritis, while in children, they could be due to respiratory tract infections. Abnormal values in pregnant women should be interpreted in conjunction with their pregnancy status, and changes in values for newborns and infants can also reflect their health conditions.

Before testing for C-reactive protein, fasting is not required, but strenuous exercise, staying up late, and excessive emotional excitement should be avoided to prevent affecting the accuracy of results. After receiving the test report, do not make self-diagnoses based solely on a single value; clinical symptoms, medical history, and other tests should be considered together, and interpretation should be done by a doctor professionally.