Fig. 1From: A retrospective comparative analysis of elderly and younger patients undergoing pulmonary resection for stage I non-small cell lung cancerKaplan-Meier curve of overall and disease-free survival in younger and elderly groups. a Five-year overall survival rates in the younger and elderly groups were 91.1 and 69.0 %, respectively. b Five-year disease-free survival rates in the younger and elderly groups were 80.2 and 49.3 %, respectivelyBack to article page