Prognostic factors for survival in a Chinese population presenting with advanced non‐small cell lung cancer with an emphasis on smoking status: A regional, single‐institution, retrospective analysis of 4552 patients

Background:  Lung cancer ranks as the top of cancer‐related mortality in the world. Approximately 85–90% of all lung cancer cases are non‐small cell lung cancer (NSCLC). For advanced NSCLC patients, the five‐year survival rate is less than 5%. Previous studies have attempted to determine prognostic factors, such as smoking status, gender, ethnicity, age, and histological type. However, the results are controversial and conflict. In this study, we investigated prognostic factors in a Chinese population presenting with advanced NSCLC.

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