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Smoking Affects Treatment Outcome in Patients with Resected Esophageal Squamous Cell Carcinoma Who Received Chemotherapy
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Smoking Affects Treatment Outcome in Patients with Resected Esophageal Squamous Cell Carcinoma Who Received Chemotherapy
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Journal Article
Smoking Affects Treatment Outcome in Patients with Resected Esophageal Squamous Cell Carcinoma Who Received Chemotherapy
2015
Overview
Cigarette smoking is reported to decrease survival and induce chemotherapy resistance in patients with various cancers. However, the impact of cigarette smoking on patients with esophageal squamous cell carcinoma (ESCC) remains unknown.
A total of 1,084 ESCC patients were retrospectively enrolled from a southern Chinese institution. Patients were divided into two groups according to their treatment modalities: the SC group (surgery with chemotherapy) (n = 306) and the S group (surgery without chemotherapy) (n = 778). Smoking status was quantified as smoking history (non-smoker, ex-smoker, and current smoker) and cumulative smoking (0, between 0 and 20, and greater than 20 pack-years). The association between cigarette smoking and overall survival (OS) was evaluated using the Kaplan-Meier method and univariate/multivariate regression analysis.
Among 1,084 patients, 702 (64.8%) reported a cigarette smoking history, and the 5-year OS for non-smokers and smokers was 45.8% and 37.3%, respectively. In the SC group, compared with non-smoker, the adjusted HRs of ex-smoker and current smoker were 1.540 (95% CI, 1.1-2.2) and 2.110 (95% CI, 1.4-3.1), respectively; there is a correlative trend of decreased OS with increased cigarette smoking (Ptrend = 0.001). These associations were insignificant in the S group. In subgroup analysis of the SC group, the lower OS conferred by smoking was not significantly modified by age, gender, body mass index, alcohol drinking, or chemotherapy method (chemotherapy and chemoradiotherapy).
Our results suggest that smoking may affect treatment outcome in patients with resected ESCC who received chemotherapy.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Aged
/ Carcinoma, Squamous Cell - complications
/ Carcinoma, Squamous Cell - drug therapy
/ Carcinoma, Squamous Cell - mortality
/ Carcinoma, Squamous Cell - surgery
/ China
/ Esophageal Neoplasms - complications
/ Esophageal Neoplasms - drug therapy
/ Esophageal Neoplasms - mortality
/ Esophageal Neoplasms - surgery
/ Female
/ Humans
/ Kinases
/ Male
/ Nicotine
/ Oncology
/ Patients
/ Smoking
/ Studies
/ Surgery
/ Survival
