log-rank test

The log-rank test is a statistical method used to compare the survival experiences of two or more groups over time. It evaluates whether there is a significant difference in the probability of an event, like recovery or failure, occurring at any point. By analyzing data collected at various times, it helps determine if the groups have different survival patterns, accounting for the timing of events and censored data (when the event hasn't happened yet for some subjects). This test is commonly used in clinical studies to assess the effectiveness of treatments or interventions.