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• W2257409812 abstract "18029 Background: Erlotinib, a tyrosine kinase inhibitor, has improved survival and quality of life in patients with non-small cell lung cancer (NSCLC) after fist-line or second-line chemotherapy. Asian origin, adenocarcinoma histology, female gender, lack of tobacco use and expression of EGFR are significant independent predictors of response to erlotinib. Although tobacco use is considered a major cause of NSCLC, other factors are involved in its pathogenesis. In underdeveloped countries such as Mexico, wood and other solid fuels are still used for cooking and heating. The physiopathological mechanisms of wood smoke exposure (WSE) as a potential risk factor for the development of NSCLC are still unknown. Methods: 125 patients with the diagnosis of NSCLC with poor performance status and after first or second-line chemotherapy were treated with erlotinib. Clinical and pathological characteristics were associated with response. Results: We found a global response to erlotinib in 39 patients (31.2%; IC 95% 23–39.3), stable disease in 33.6% and progression in 33.6%. Clinical improvement and favorable changes in status performance were observed in 54.4 and 33.6%, respectively. The clinical features associated with response to erlotinib in the univariate analysis were female gender (44 vs 15.7% p=0.001), non-smokers (45.6 vs 19%, p=0.001), adenocarcinoma (33.8 vs 16% p=0.009) and WSE (81 vs 14% p=0.001). Only the histological type (p=0.049) and WSE (p=0.001) were of statistical significance in the logistic regression analysis. The factors associated to an improved progression-free survival (PFS) in the Cox multivariate analysis were: adenocarcinoma histology (7.6 ±0.7 vs 2.7 ±0.4 months, p=0.002), female gender (7.6 ±1.3 vs 3.97 ±1.5, p=0.027) and WSE (8.43 ±0.5 vs 4.8 ±0.9, p=0.011). Conclusions: Conclusion: WSE is associated with response to erlotinib in patients with NSCLC and may indicate an improved PFS. The EGFR mutation is probably involved in the development of NSCLC in non-smokers with WSE. No significant financial relationships to disclose." @default.
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• W2257409812 date "2007-06-20" @default.
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• W2257409812 title "Wood-smoke exposure as a survival predictor in non-small cell lung cancer with response to erlotinib: An open label phase II study" @default.
• W2257409812 doi "https://doi.org/10.1200/jco.2007.25.18_suppl.18029" @default.
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