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Survival between the time period of 1999-2003 and 2004-2008. A-D: Among all primary NSCLC patients (n=288,670), overall survival improved significantly for patients with stage I, stage, III, and stage IV NSCLC between the time periods 1999-2003 and 2004-2008 (P<0.0001). E-H: Among the 93,633 patients receiving radiotherapy, treatment given during the recent time period (2004-2008) is correlated with enhanced OS compared to the earlier time period (1999-2003).
