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• W1999462166 abstract "BackgroundThere has been a growing interest in lung cancer in never-smokers.MethodsUtilizing a database from the National Hospital Study Group for Lung Cancer, information for never-smokers and ever-smokers with advanced non-small cell lung cancer was obtained from 1990 to 2005, including clinicopathologic characteristics, chemotherapy response, and survival data. Time of diagnosis was classified into two periods: 1990–1999 and 2000–2005. Multivariate analysis was performed using the Cox regression and logistic regression method, including gender, age, performance status, histology, stage, and period of diagnosis.ResultsThere were 1499 never-smokers and 3455 ever-smokers with advanced stage IIIB and IV diseases who received cytotoxic chemotherapy. Never-smokers generally included more females, were younger, with better performance status and more adenocarcinoma diagnosed (p < 0.0001 for all). Smoking status was a significant prognostic factor (never-smoker versus ever-smoker; hazard ratio [HR] = 0.880, 95% confidence interval [CI]: 0.797–0.970; p = 0.0105). In separate multivariate analysis for never-smokers and ever-smokers, female gender and better performance status (p < 0.0001 for both) were both favorable prognostic factors. However, adenocarcinoma histology (versus squamous cell carcinoma; HR = 0.790, 95% CI: 0.630–0.990; p = 0.0403) and the period after 2000 (versus before 2000; HR = 0.846, 95% CI: 0.731–0.980; p = 0.0254) were significant only in the never-smokers, and younger age (HR = 1.007, 95% CI: 1.003–1.011; p = 0.0010) was significant only in the ever-smokers. In an exploratory analysis, different profiles were observed in predictive factors for chemotherapy response between the two groups.ConclusionsNever-smokers with non-small cell lung cancer lived longer than ever-smokers. Gender, histology, and time of diagnosis are important factors for prognosis in these patients. There has been a growing interest in lung cancer in never-smokers. Utilizing a database from the National Hospital Study Group for Lung Cancer, information for never-smokers and ever-smokers with advanced non-small cell lung cancer was obtained from 1990 to 2005, including clinicopathologic characteristics, chemotherapy response, and survival data. Time of diagnosis was classified into two periods: 1990–1999 and 2000–2005. Multivariate analysis was performed using the Cox regression and logistic regression method, including gender, age, performance status, histology, stage, and period of diagnosis. There were 1499 never-smokers and 3455 ever-smokers with advanced stage IIIB and IV diseases who received cytotoxic chemotherapy. Never-smokers generally included more females, were younger, with better performance status and more adenocarcinoma diagnosed (p < 0.0001 for all). Smoking status was a significant prognostic factor (never-smoker versus ever-smoker; hazard ratio [HR] = 0.880, 95% confidence interval [CI]: 0.797–0.970; p = 0.0105). In separate multivariate analysis for never-smokers and ever-smokers, female gender and better performance status (p < 0.0001 for both) were both favorable prognostic factors. However, adenocarcinoma histology (versus squamous cell carcinoma; HR = 0.790, 95% CI: 0.630–0.990; p = 0.0403) and the period after 2000 (versus before 2000; HR = 0.846, 95% CI: 0.731–0.980; p = 0.0254) were significant only in the never-smokers, and younger age (HR = 1.007, 95% CI: 1.003–1.011; p = 0.0010) was significant only in the ever-smokers. In an exploratory analysis, different profiles were observed in predictive factors for chemotherapy response between the two groups. Never-smokers with non-small cell lung cancer lived longer than ever-smokers. Gender, histology, and time of diagnosis are important factors for prognosis in these patients." @default.
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• W1999462166 date "2010-07-01" @default.
• W1999462166 modified "2023-10-16" @default.
• W1999462166 title "Gender, Histology, and Time of Diagnosis Are Important Factors for Prognosis: Analysis of 1499 Never-Smokers with Advanced Non-small Cell Lung Cancer in Japan" @default.
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• W1999462166 doi "https://doi.org/10.1097/jto.0b013e3181dc213e" @default.
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