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Related Experiment Videos

Cigarette Smoking and Pancreatic Cancer Survival.

Chen Yuan1, Vicente Morales-Oyarvide1, Ana Babic1

  • 1Chen Yuan, Vicente Morales-Oyarvide, Ana Babic, Zhi Rong Qian, Douglas A. Rubinson, Kimmie Ng, Shuji Ogino, Charles S. Fuchs, and Brian M. Wolpin, Dana-Farber Cancer Institute and Harvard Medical School; Chen Yuan, Peter Kraft, Edward L. Giovannucci, Shuji Ogino, Meir J. Stampfer, Howard D. Sesso, and JoAnn E. Manson, Harvard School of Public Health; Ying Bao, Edward L. Giovannucci, Shuji Ogino, Meir J. Stampfer, John Michael Gaziano, Howard D. Sesso, JoAnn E. Manson, and Charles S. Fuchs, Brigham and Women's Hospital and Harvard Medical School; John Michael Gaziano, Massachusetts Veterans Epidemiology Research and Information Center, VA Boston Healthcare System, Boston; Clary B. Clish, Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, MA; and Barbara B. Cochrane, University of Washington School of Nursing, Seattle, WA.

Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology
|March 31, 2017
PubMed
Summary

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Cigarette smoking significantly reduces survival in pancreatic cancer patients. Heavy smokers, identified by cotinine levels, face a substantially higher risk of death compared to non-smokers.

Area of Science:

  • Oncology
  • Epidemiology
  • Toxicology

Background:

  • Cigarette smoking is a known risk factor for pancreatic cancer incidence.
  • Prospective studies on smoking's impact on pancreatic cancer patient survival are limited.
  • Nicotine metabolite cotinine levels reflect tobacco smoke exposure.

Purpose of the Study:

  • To prospectively evaluate the association between smoking status and survival in pancreatic cancer patients.
  • To assess survival based on prediagnostic circulating cotinine levels, categorizing smokers.
  • To determine the impact of smoking intensity on pancreatic cancer patient outcomes.

Main Methods:

  • Analysis of survival data from 1,037 patients in US prospective cohort studies (1986-2013).
  • Evaluation of survival by prediagnostic cotinine levels (nonsmokers, light smokers, heavy smokers) in 485 patients.

Related Experiment Videos

  • Use of Cox proportional hazards models adjusted for key demographic and clinical factors.

    • Main Results:

    • Current smokers had a 37% increased hazard ratio (HR) for death compared to never smokers (HR=1.37).
    • Higher pack-years of smoking showed a significant negative trend in survival (Ptrend=0.008).
    • Heavy smokers, based on cotinine levels, had a 76% increased HR for death versus nonsmokers (HR=1.76).

    Conclusions:

    • Cigarette smoking is associated with reduced survival in pancreatic cancer patients.
    • Higher smoking intensity, indicated by cotinine levels, correlates with poorer survival.
    • Quitting smoking may not immediately restore survival rates to those of never smokers.