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What is survival analysis and why should I learn it? Survival analysis was originally developed and applied heavily by the actuarial and medical community. Its purpose was to answer why do events occur now versus later under uncertainty (where events might refer to deaths, disease remission, etc.). This is great for researchers who are interested in measuring lifetimes: they can answer questions like what factors might influence deaths?

But outside of medicine and actuarial science, there are many other interesting and exciting applications of survival analysis. For example:

• SaaS providers are interested in measuring subscriber lifetimes, or time to some first action
• inventory stock out is a censoring event for true "demand" of a good.
• sociologists are interested in measuring political parties' lifetimes, or relationships, or marriages
• A/B tests to determine how long it takes different groups to perform an action.

lifelines is a pure Python implementation of the best parts of survival analysis.

Documentation and intro to survival analysis

If you are new to survival analysis, wondering why it is useful, or are interested in lifelines examples, API, and syntax, please read the Documentation and Tutorials page

Contact

• Start a conversation in our Discussions room.
• Some users have posted common questions at stats.stackexchange.com.
• Creating an issue in the Github repository.

Development

See our Contributing guidelines.