Fig. 3
The overall estimated local tumor progression-free interval for different ages and sex. a, three groups divided by age < 70, 70 to 75, > 75 years. A significant difference was only seen between patients < 70 and > 75 years old (log rank test, p = 0.028). b, Furthermore, regarding the overall estimated local tumor progression-free interval of male and female patients, female patients had worse local control compared to male patients (log rank test, p = 0.003)