That doesn't mean you got the wrong treatment. Cancer cells are tricky, and some can survive aggressive therapies. It only takes a few cells. Cancer recurrence means the cancer you originally had ...

Predictive accuracy was determined using the concordance index. RESULTS: Depending on the definition the recurrence-free probability was 86% to 91% at 3 years and 81% to 87% at 5 years.

For these analyses, the treatment effect is presented as a between-group difference in the restricted mean survival time in days until recurrence (partner-treatment group minus control group), and ...