2.2. Survival
death
The rates of overall survival and progression-free survival were compared between the two groups. Patients were followed up for 5 years. Overall survival was defined as the period of time from the day of randomized assignment to that of death due to any cause. Progression-free survival was defined as the period of time from the day of randomized assignment to that of either local/regional or distant progression or death due to any cause. 