Kaplan-Meier plot illustrating the influence of age on EFS and OS. (A) EFS rates at 2 years were 39.3% (95% CI, 32.7%-47.3%) and 33.6% (95% CI, 24.0%-47.1%) for younger and older patients, respectively. (B) OS rates at 2 years were 53.2% (95% CI, 46.2%-61.3%) and 45.6% (95% CI, 35.3%-58.8%) for younger and older patients, respectively.