Obesity is associated with long-term improved survival in definitively treated locally advanced non-small cell lung cancer (NSCLC)

Vincent K. Lam, Søren M. Bentzen, Pranshu Mohindra, Elizabeth M. Nichols, Neha Bhooshan, Melissa Vyfhuis, Katherine A. Scilla, Steven J. Feigenberg, Martin J. Edelman, Josephine L. Feliciano

Research output: Contribution to journalArticlepeer-review

Abstract

Objectives To determine the prognostic effect of Body Mass Index (BMI) in definitively treated locally advanced NSCLC patients. Materials and methods In this single institution retrospective cohort study, we evaluated 291 patients who were treated for locally advanced NSCLC from 2000 to 2010. They were stratified into four BMI groups based on World Health Organization criteria: underweight (<18.5 kg/m2), normal weight (18.5 to <25 kg/m2), overweight (25 to <30 kg/m2), and obese (≧30 kg/m2). Overall survival was analyzed by BMI group. Results Baseline patient characteristics and treatment parameters were similar between obese and normal weight patients. Increasing BMI was associated with improved overall survival (P = 0.011), even when underweight cases were excluded. There was a sustained 31%–58% reduction in mortality of obese relative to normal weight patients (HR 0.68 ± 0.21, 0.61 ± 0.19, and 0.42 ± 0.19, for each year post-treatment respectively). Statin use after diagnosis was highly associated with increasing BMI (P < 0.001) and predicted improved survival in a multivariate analysis (HR 0.60, 95% CI 0.41–0.89, P = 0.011). Conclusion Obese patients in this retrospective study had significantly improved survival relative to normal weight patients. Our data suggest that the protective effect of obesity in locally advanced NSCLC is not solely due to short-term treatment effects, decreased smoking exposure, or poor prognostic factors from underweight patients. Notably, statin use was also associated with improved survival. Additional studies are needed to clarify the mechanisms and possible concomitant factors underlying the obesity paradox in NSCLC.

Original languageEnglish (US)
Pages (from-to)52-57
Number of pages6
JournalLung Cancer
Volume104
DOIs
StatePublished - Feb 1 2017
Externally publishedYes

Keywords

  • BMI (Body Mass Index)
  • Locally advanced
  • Lung cancer
  • Non-small cell
  • Obesity
  • Statin

ASJC Scopus subject areas

  • Oncology
  • Pulmonary and Respiratory Medicine
  • Cancer Research

Fingerprint Dive into the research topics of 'Obesity is associated with long-term improved survival in definitively treated locally advanced non-small cell lung cancer (NSCLC)'. Together they form a unique fingerprint.

Cite this