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  • Title: EGFR mutations in non-small-cell lung cancer among smokers and non-smokers: a meta-analysis.
    Author: Ren JH, He WS, Yan GL, Jin M, Yang KY, Wu G.
    Journal: Environ Mol Mutagen; 2012 Jan; 53(1):78-82. PubMed ID: 22223435.
    Abstract:
    Mounting evidence has suggested somatic mutations in the EGFR gene are associated with better responsiveness to EGFR tyrosine kinase inhibitors (TKIs) in patients with non-small-cell lung cancer (NSCLC). Some, but not all, studies have reported that the mutations were more frequently observed in patients without a smoking history. To comprehensively address this issue, we performed a meta-analysis to evaluate the association between cigarette-smoking history and mutation of the EGFR gene in NSCLC. Twenty-six studies, involving 3,688 patients with NSCLC were included in the analysis. The pooled analysis shows that the incidence of EGFR mutations in NSCLC differs according to cigarette-smoking history. The odds ratio (OR) for the EGFR mutation in non-smokers relative to smokers was 4.829 (95% confidence interval [CI]: 3.598-6.482; P < 0.001). These data may assist clinicians in assessing the likelihood of EGFR mutations in patients with NSCLC when mutational analysis is not feasible.
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