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🦠 Neutrophil-to-Lymphocyte Ratio (NLR)

UseGauge physiological stress/inflammation and prognosis.

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SourceZahorec R. Bratisl Lek Listy 2001

Runs locally in your browser (no PHI uploaded). For licensed clinicians — not a substitute for clinical judgement.
Stored on this device for revisit reminders

This-shift next steps

After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.

Scene next step
📋hematologyOpen scene pack →
Related scores
Matching pathway
🧭febrile_neutropeniaOpen pathway →
Score + version; reference only — not a substitute for care · no HIS write

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Methodology · worked example, guidelines & full notes
Clinical takeaway

Non-specific — rises with infection, stress and malignancy.

When to use

Gauge physiological stress/inflammation and prognosis.

How it works

NLR = absolute neutrophils ÷ absolute lymphocytes. Adult normal about 1–2; > 3.0 or < 0.7 is abnormal; 2.3–3.0 is a grey zone (Zahorec 2021).

Key points

  • Non-specific — rises with infection, stress and malignancy.
  • Has prognostic value across many conditions.
  • Interpret in clinical context.

References

Worked calculation

The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.

Absolute neutrophils6.0 ×10⁹/L
Absolute lymphocytes2.0 ×10⁹/L

→NLR3.0

  • Interpretation：2.3–3.0 — grey zone
Verification & sources · governance
FAQ

Frequently asked questions

What are the limits and cautions when using Neutrophil-to-Lymphocyte Ratio (NLR)?
For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
Does Neutrophil-to-Lymphocyte Ratio (NLR) upload patient data? Where is it calculated?
Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
How is Neutrophil-to-Lymphocyte Ratio (NLR) calculated in practice? Can you show a worked example?
Inputs: Absolute neutrophils 6.0 ×10⁹/L, Absolute lymphocytes 2.0 ×10⁹/L → Result: NLR 3.0（Interpretation: 2.3–3.0 — grey zone）
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