CRP
C-reactive protein
Normal
4.2mg·L⁻¹Ref 0.1–4.9 mg·L⁻¹
Z +1.42↑ Bad

The card shows an example result of 4.2 mg·L⁻¹, which is 1.42 SD above the mean.

What it measures

C-reactive protein is an acute-phase protein made by the liver. It rises within hours of infection, injury, or an inflammatory flare and falls as it settles.

Reference range

FieldValue
AbbreviationCRP
GroupInflammation
Unitmg·L⁻¹
Healthy range0.1–4.9
Mean2.5
SD1.2
Direction↑ Bad — a raised value is the concern.

The mean is (low + high) / 2 and the SD is (high − low) / 4, so the healthy range covers Z from −2 to +2.

Reading the result

  • High — Suggests inflammation somewhere in the body, from infection, injury, or an inflammatory condition. It does not say where.
  • Low — Not a concern.

Notes

  • The standard test is less sensitive than hs-CRP at low levels. Use hs-CRP for cardiovascular risk.
  • A single value is a snapshot. Trends over time say more.
  • This page is general information, not medical advice. Discuss results with a clinician.