Figure 1

Kaplan-Meier estimated disease-free survival curves by age categories (solid line: >60 and <65 years; dashed line: ≥ 65 years; crosses indicate censoring)
Kaplan-Meier estimated disease-free survival curves by age categories (solid line: >60 and <65 years; dashed line: ≥ 65 years; crosses indicate censoring)