Background: Neutrophil-to-lymphocyte ratio (NLR) has been used as an inflammation based prognostic marker for various malignancies. This study evaluated the association between NLR and overall survival (OS) in patients with metastatic gallbladder cancer (GBC) METHODS: An optimal cut off point for NLR was identified by plotting spline-based hazard ratio curves to identify a threshold effect and patients were divided into two groups, ≥5 or <5. Kaplan-Meier curves were plotted for NLR≥5 and NLR<5 and OS between the two groups.
Results: Of the 231 patients included, 138 (60%) had NLR <5 and 93 (40%) had NLR ≥5. There were no significant differences noted in gender, race, and administration of chemotherapy between the two groups. On univariable analysis, patients with NLR ≥5 had a significantly poor OS compared to those with NLR <5 (Median OS: 3.6 vs 8.7 months, p < 0.001). On multivariable analysis, adjusting for age, performance status, albumin, alkaline phosphatase, alanine aminotransferase, aspartate aminotransferase, bilirubin, platelet count and no administration of chemotherapy, NLR of ≥5 was associated with a worse OS compared to NLR <5 (HR: 1.70, 95%CI:1.20-2.39, p < 0.05).
Conclusion: The current study demonstrates that NLR ≥5 is an independent predictor of poor prognosis in patients with metastatic GBC.
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