Duration of smoking abstinence as a predictor for non-small-cell lung cancer survival in women

J. O. Ebbert, B. A. Williams, Z. Sun, M. C. Aubry, J. A. Wampfler, Y. I. Garces, R. L. Meyer, P. Yang

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

Background: Previous studies have attempted to investigate the impact of smoking cessation on lung cancer survival but have been limited by small numbers of former smokers and incomplete data. Methods: Over a six-year period, 5229 patients with non-small-cell lung cancer (NSCLC) and small-cell lung cancer (SCLC) were enrolled in a prospective cohort of whom 2052 were former smokers. Patient's characteristics were obtained from medical records and a baseline interview. Vital status was determined through multiple sources. Cox proportional hazards models were used to estimate the effect of smoking abstinence on post-diagnosis mortality. Results: For all patients with NSCLC, the median survival among never, former, and current smokers was 1.4 years, 1.3 years, and 1.1 years, respectively (P < 0.01). Female NSCLC patients had a significantly lower risk of mortality with a longer duration of smoking abstinence (RR per 10 years of smoking abstinence = 0.85; 95% CI: 0.75, 0.97). No effect of smoking abstinence on mortality was observed for women with SCLC or for men with either histologic group. Conclusions: The identification of smoking history as a prognostic factor in lung cancer survival supports previous research suggesting a direct biologic effect of smoking on survival. However, this effect may vary by sex and type of lung cancer.

Original languageEnglish (US)
Pages (from-to)165-172
Number of pages8
JournalLung Cancer
Volume47
Issue number2
DOIs
StatePublished - Feb 2005

Keywords

  • Carcinoma
  • Lung neoplasms
  • Non-small-cell lung
  • Prognosis
  • Sex
  • Small-cell
  • Smoking cessation

ASJC Scopus subject areas

  • Oncology
  • Pulmonary and Respiratory Medicine
  • Cancer Research

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