Survival can be measured in various ways. The choice of measurement depends on the research question or __________ ___ _________________

• A. Event of interest
• B. Population size
• C. Timeframe
• D. Study design

Answer: (A)

Survival analysis is driven by what event you’re focused on. The measurement you choose must match the specific outcome you care about, because survival time is defined as the time from a starting point to that particular event. If the question is about death, you measure time to death; if it’s about relapse, you measure time to relapse. The stated timeframe, the number of participants, or even the study design can influence how data are collected or analyzed, but they don’t determine which event defines the survival outcome. So the research question or the event of interest guides the measurement.