Abstract
Asian ethnicity is associated with a distinct molecular etiology, treatment response, and survival outcome among patients with non-small cell lung cancer (NSCLC). This study examines the survival impact of platinum-based adjuvant chemotherapy for Asian patients with stage I-IIIA NSCLC. This study recruited patients aged ≥18 years with histologically proven stage IA-IIIA NSCLC registered in the Taiwan Cancer Registry database in January 2004 to December 2007. Platinum-containing adjuvant chemotherapy had to be started within 90 days of the primary surgery. Kaplan-Meier survival curves, log-rank tests, and the Cox proportional hazards regression model were used to assess the influence of various risk factors on survival time. This study included 2,231 patients with stage IA-IIIA NSCLC who underwent primary surgery with a clear surgical margin. The percentages of all causes of death were significantly lower for the chemotherapy group for both stage II and stage IIIA patients. Multivariate analysis identified platinum-based adjuvant chemotherapy as an independent prognostic factor for the overall survival outcome of stage II (hazard ratio [HR], 0.61; 95% confidence interval [CI], 0.39-0.94; p = .024) and IIIA (HR, 0.71; 95% CI, 0.52-0.96; p = .029) patients. Among these patients, those who received adjuvant chemotherapy had a superior overall survival outcome for both genders, for the subgroup of patients aged ≥70 years, and for those with adenocarcinoma. Platinum-based adjuvant chemotherapy should be considered in the treatment plan for Asian patients with resected stage II and stage IIIA NSCLC.
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