What do my CBC values mean?

For evidence-based information about CBC (Complete Blood Count), visit this page.

Is there any sign of anemia or infection? Are additional tests needed?

For evidence-based information about CBC (Complete Blood Count), visit this page.

Which specific parameters require follow-up?

For evidence-based information about CBC (Complete Blood Count), visit this page.

What factors may be affecting my results?

For evidence-based information about CBC (Complete Blood Count), visit this page.

How often should I be retested?

For evidence-based information about CBC (Complete Blood Count), visit this page.

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CBC (Complete Blood Count)

⚠️ Update approaching🔬 Evidence: StrongHematology

Diğer adları: Blood count, CBC, Complete blood count

⚠️

Discuss your test results with your doctor. This page is for informational purposes only and does not provide a diagnosis.

⚡ Key Facts

• Evaluates three main cell groups in blood: red blood cells, white blood cells, and platelets • One of the most commonly ordered blood tests • Provides information about anemia, infection, clotting, and general health • Results are interpreted as a panel, not in isolation

🧪 What Does This Test Measure?

The CBC (complete blood count) evaluates the count, proportion, and characteristics of three main blood cell groups: red blood cells, white blood cells, and platelets.

📋 Why Is It Ordered?

Ordered for general evaluation, anemia or infection investigation, preoperative assessment, and monitoring of many medical conditions.

🔧 Preparation

No special preparation is required for the CBC. Fasting is generally not necessary and the test can be performed at various times of day.

📊 Reference Ranges

Hemoglobin — Men: 13–17 g/dL, Women: 12–15 g/dL WBC: 4,000–10,000/µL Platelets: 150,000–400,000/µL ⚠️ Reference ranges vary by laboratory, age, and sex.

⬆️ High Values

Elevated hemoglobin may indicate dehydration or polycythemia; elevated WBC may suggest infection, stress, or inflammation; elevated platelets may be reactive or related to a myeloproliferative disorder.

⬇️ Low Values

Low hemoglobin indicates anemia; low WBC may be associated with certain medications or viral infections; low platelets may be associated with immune conditions or bone marrow disorders.

⚙️ What Can Affect Results?

Dehydration, medications, exercise, pregnancy, altitude, and normal biological variation may affect CBC results.

🔬 Evidence Summary

Strong evidence: 1 guideline, 1 meta-analysis, 4 reviews, 1 observational study.

📚 Most Important Studies on This Topic

Guideline on haemoglobin cutoffs to define anaemia in individuals and populations

Guideline· WHO · 2024 · PMID: NBK602198

How to interpret and pursue an abnormal complete blood cell count in adults

Review· Mayo Clinic Proceedings · 2005 · PMID: 16007898

Iron-deficiency anemia

Review· N Engl J Med · 2015 · PMID: 25946282

✅ Key Takeaways

💡

What you learned: The CBC provides a comprehensive overview of blood cell counts and characteristics. Abnormalities are evaluated alongside clinical context and may prompt further testing.

⛔

CBC results alone cannot diagnose specific conditions. Clinical correlation and additional tests are needed for definitive evaluation.

🔬 Sources Used on This Page

7 sources · Most recent publication: 2024

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Guideline

Expert society and guideline recommendations

source

📊

Systematic review / meta-analysis

Combined analysis of multiple studies

source

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Review

Comprehensive topic evaluation

sources

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Observational

Observational and cohort studies

source

Overall assessment: Evidence level for this topic is strong. This page is supported by 1 guideline, 1 systematic review/meta-analysis, 4 reviews, 1 observational study.

📝 Questions to Ask Your Doctor

Be prepared for your appointment. Add questions to your list.

📋 References

[PMID: NBK602198] Guideline on haemoglobin cutoffs to define anaemia in individuals and populations. WHO, 2024.

[PMID: 38910369] Revised WHO Guidelines on Hemoglobin Cutoffs to Define Anemia in Individuals and Populations. Indian Pediatrics, 2024.

[PMID: 36359216] Significance of the Complete Blood Count in Cardiovascular and Metabolic Diseases. Biomedicines, 2022.

[PMID: 34345918] The accuracy of mean corpuscular volume guided anaemia classification in primary care. Family Practice, 2021.

[PMID: 25946282] Iron-deficiency anemia. N Engl J Med, 2015.

[PMID: 19880817] Red cell distribution width as a novel prognostic marker in heart failure. Journal of the American College of Cardiology, 2009.

[PMID: 16007898] How to interpret and pursue an abnormal complete blood cell count in adults. Mayo Clinic Proceedings, 2005.

Last reviewed: 3/26/2026

Next review: 3/26/2027

🔗 Related Topics

🩺 Iron deficiency anemia 🩺 Talasemi 🧪 Ferritin 🧪 Demir bağlama kapasitesi (TDBK)🧪 Vitamin B12 🧪 CRP (C-reaktif protein)

⚖️ This page does not replace medical advice. Make treatment decisions with your doctor.
Content is based on scientific studies indexed in PubMed and current clinical guidelines.