Prognostic significance of pre-treatment neutrophil-to-lymphocyte ratio (NLR) in patients with oropharyngeal cancer treated with radiotherapy

Br J Cancer. 2021 Feb;124(3):628-633. doi: 10.1038/s41416-020-01106-x. Epub 2020 Oct 14.

Abstract

Background: This study aimed to evaluate the prognostic value of pre-treatment NLR in patients with oropharyngeal cancer.

Methods: Patients who completed definitive radiotherapy (RT) for oropharyngeal cancer and had blood counts taken pre-RT from 2002 to 2013 were included. NLR was calculated as total neutrophil/lymphocytes. Survival rates were estimated using the Kaplan-Meier method. Univariable and multivariable analyses were conducted with linear and Cox regression methods. NLR was analysed posteriori and dichotomised on the discovered median.

Results: Eight hundred and forty-eight patients were analysed. The median pre-RT NLR was 3. Patients with NLR of <3 had improved overall survival (OS) than those with NLR ≥ 3 (5-year OS 85 vs 74%, p < 0.0001). OS differences remained significant when stratified according to HPV status (HPV-positive p = 0.011; HPV-negative p = 0.003). Freedom from any recurrence (FFR), locoregional control (LRC) and freedom of distant recurrence (FDR) were better in those with NLR < 3. The negative impact of elevated pre-RT NLR on OS (HR = 1.64, p = 0.001), FFR (HR = 1.6, p = 0.006) and LRC (HR = 1.8, p = 0.005) remained significant on multivariable analysis.

Conclusions: Pre-RT NLR is an independent prognostic factor in patients with oropharyngeal cancer regardless of HPV status. Patients with lower NLR had more favourable OS and disease control.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Analysis of Variance
  • Carcinoma, Squamous Cell / blood*
  • Carcinoma, Squamous Cell / mortality*
  • Carcinoma, Squamous Cell / radiotherapy
  • Carcinoma, Squamous Cell / virology
  • Female
  • Humans
  • Kaplan-Meier Estimate
  • Leukocyte Count
  • Lymphocyte Count
  • Lymphocytes*
  • Male
  • Middle Aged
  • Neutrophils*
  • Oropharyngeal Neoplasms / blood*
  • Oropharyngeal Neoplasms / mortality*
  • Oropharyngeal Neoplasms / radiotherapy
  • Oropharyngeal Neoplasms / virology
  • Papillomaviridae / isolation & purification
  • Prognosis
  • Regression Analysis
  • Retrospective Studies
  • Time Factors