Objective: The aim of this study was to determine the epidemiological characteristics of never-smoking patients with non-small cell lung cancer (NSCLC) detected with clinic-based screening programs, focusing on clinical risk factors and survival.
Methods: The medical records of NSCLC patients (n=285) diagnosed at Fujisawa City Hospital between April 2000 and December 2010 with lesions that were originally detected with clinic-based screening programs in Fujisawa City were reviewed to identify the clinicopathological variables and survival outcomes.
Results: Of the 285 NSCLC patients, 95 (33.3%) were never-smokers. A comparison between the never-smoking and ever-smoking patients revealed that the never-smokers included a significantly greater proportion of women and patients with adenocarcinoma (86.3% vs. 12.6%: p<0.001 or 94.7% vs. 55.8%: p<0.001, respectively). The overall survival rate of the never-smoking patients was significantly superior to that of the ever-smokers (p=0.004). In addition to smoking status, factors found to be significantly associated with the overall survival rate in univariate analyses were gender, stage, histology and first line treatment. A multivariate analysis revealed smoking status to be an independent prognostic factor in addition to stage and first line treatment.
Conclusion: The differences in the clinicopathological factors and survival outcomes between never-smoking and ever-smoking patients with NSCLC detected with clinic-based screening programs suggest that persuading people to never start smoking is important.
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