Neutrophil-Lymphocyte Ratio (NLR) Calculator
- Neutrophil–Lymphocyte Ratio (NLR): Explanation and Clinical Context
The Neutrophil–Lymphocyte Ratio (NLR) is calculated by dividing the absolute neutrophil count by the absolute lymphocyte count.
It is an inexpensive and widely available marker of systemic inflammation.
Elevated NLR has been associated with adverse outcomes in cardiovascular diseases, cancer, and critical illness.
Cut-offs vary by clinical context, but in cardiovascular risk stratification: <2 is considered low risk, 2–5 moderate risk, and >5 high risk of adverse outcomes.
This ratio helps clinicians quickly assess the balance between innate (neutrophils) and adaptive (lymphocytes) immunity, reflecting systemic stress and inflammation.
Reference:
Gibson PH, et al. Circulation. 2007;116:552-558. doi:10.1161/CIRCULATIONAHA.107.702922
Bhat T, et al. Am J Cardiol. 2013;112:726-732. doi:10.1016/j.amjcard.2013.04.034
Discussion
No discussions yet. Be the first to comment.
Create Note
Notes are stored privately on your device only. No login required. Nothing is uploaded or shared.