Impact of smoking on mortality of patients with non-small cell lung cancer

Background Cigarette smoking is one of the major causes of lung cancer. However, the correlation between smoking status and the survival of patients with lung cancer is uncertain. The present study aimed to evaluate the impact of smoking status on the mortality of patients with non‐small cell lung c...

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Bibliographic Details
Published in:Thoracic cancer 2014-01, Vol.5 (1), p.43-49
Main Authors: Lee, Seung Jun, Lee, Jinwoo, Park, Young Sik, Lee, Chang-Hoon, Lee, Sang-Min, Yim, Jae-Joon, Yoo, Chul-Gyu, Han, Sung Koo, Kim, Young Whan
Format: Article
Language:English
Subjects:
Lung cancer
Medical prognosis
Mortality
non-small cell lung cancer
Original
risk factors
Smoking
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Summary:Background Cigarette smoking is one of the major causes of lung cancer. However, the correlation between smoking status and the survival of patients with lung cancer is uncertain. The present study aimed to evaluate the impact of smoking status on the mortality of patients with non‐small cell lung cancer (NSCLC). Methods The medical records of 313 patients newly diagnosed with NSCLC between January 2005 and January 2006 were reviewed. Eligible patients were divided into ever‐smokers (221 patients) and never‐smokers (92 patients), and the overall survival and clinical characteristics of the two groups were compared. Predictors of survival were analyzed using Cox's proportional hazards regression. Results In ever‐smokers, the mean age was higher, and male gender and squamous histology were predominant compared to never‐smokers. The median survival time was longer in never‐smokers (21.1 vs. 41.9 months, ever‐smokers vs. never‐smokers, respectively; P = 0.027). Overall survival estimates at 12, 24, and 60 months were 62.9 versus 82.6%, 43.4 versus 65.2%, and 31.2 versus 42.4%, in each group. Advanced age, advanced disease stage (stages III and IV), and coexistence of interstitial lung disease were analyzed as independent risk factors for shorter survival. Although ever‐smoking was not an independent risk factor, current smoking was a risk factor for higher mortality. Conclusions The overall mortality of ever‐smokers was higher than that of never‐smokers in patients with newly diagnosed NSCLC, and current smoking was an independent risk factor for a poorer prognosis.
ISSN:1759-7706
1759-7714
DOI:10.1111/1759-7714.12051