CD4 Percentage
- Sample Type
- Standard
- Fasting
- No
- Unit
- %
The CD4 Percentage measures the proportion of lymphocytes that are CD4+ T-helper cells. Within the 'CD4 & CD8 Count' panel, this is often considered more stable than the absolute CD4 count because it is not influenced by fluctuations in the total white blood cell count or total lymphocyte count. It is a critical marker for monitoring immune status in HIV/AIDS patients, particularly in pediatric populations where absolute counts vary significantly by age. It helps clinicians determine the risk of opportunistic infections and the effectiveness of Antiretroviral Therapy (ART).
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Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Results can be misleading if the patient has a concurrent infection or has recently undergone intense physical stress. Furthermore, the percentage might remain stable even if the absolute count is dropping in certain lymphopenic states, requiring expert interpretation of the full lymphocyte subset panel.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for CD4 Percentage:
Official Sources
- CD4 Count - Testing.comTesting.com
Research & Guidelines
- PubMed: CD4 Percentage Clinical GuidelinesNCBI / PubMed
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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