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NLR Formula:
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The Neutrophil Lymphocyte Ratio (NLR) is a simple biomarker calculated from a complete blood count (CBC) that represents the ratio of neutrophil percentage to lymphocyte percentage. It's used as an indicator of systemic inflammation and has prognostic value in various medical conditions.
The calculator uses the NLR formula:
Where:
Explanation: The NLR is calculated by dividing the neutrophil percentage by the lymphocyte percentage from a standard complete blood count test.
Details: NLR is a valuable inflammatory marker that has been associated with prognosis in various conditions including infections, cardiovascular diseases, and cancers. It provides a simple way to assess the balance between innate (neutrophils) and adaptive (lymphocytes) immunity.
Tips: Enter the neutrophil and lymphocyte percentages from your complete blood count test. Both values must be greater than 0 and typically sum to less than 100% of white blood cells (along with other cell types).
Q1: What is a normal NLR value?
A: A normal NLR typically ranges from 1 to 3, though this can vary slightly between populations and laboratories.
Q2: What does a high NLR indicate?
A: Elevated NLR values may indicate increased systemic inflammation, which has been associated with various conditions including infections, stress responses, and chronic diseases.
Q3: Can NLR be used for diagnosis?
A: NLR is not a diagnostic tool by itself but serves as a prognostic marker and indicator of inflammatory status that should be interpreted alongside other clinical findings.
Q4: Are there limitations to NLR?
A: Yes, NLR can be influenced by many factors including recent infections, medications, stress, and individual variations. It should always be interpreted in clinical context.
Q5: How often should NLR be measured?
A: The frequency of NLR measurement depends on the clinical situation. For monitoring chronic conditions, it might be measured periodically, while in acute settings, it might be measured more frequently.