Survival Analysis - Time and Event
There are basically only two data points that are used for core survival analysis:
- Time (t)
- Specified in ascending numbers, from 0 to X
- 0 = no = censoring
- 1 = yes
Censoring is when the row has a 0 for Event. Censoring can happen b/c of two different reasons:
- Right censoring = they lived longer than our observable period, but we don't know how long.
- Left censoring = they started before our observable period, but we don't know when.