Like so many of the others on this forum, I've had terrible sinus headaches after having a root canal done 3 weeks ago. It started as soon as the Novocaine wore off. It was almost unbearable for the first 2 days. It began around my right eye and nose (the root canal was in my upper right side).
Survival analysis is generally defined as a set of methods for analyzing data where the outcome variable. is the time until the occurrence of an event of interest. The event can be death, occurrence of a disease, marriage, divorce, etc. The time to event or survival time can be measured in days, weeks, years, etc.
When someone is interested in how survival is affected by the disease, there is also the net survival rate, which filters out the effect of mortality from other causes than the disease. The two main ways to calculate net survival are relative survival and cause-specific survival or disease-specific survival.