Part V

Analyzing Survival Data

Illustration by Wiley, Composition Services Graphics

Estimate sample size in a variety of situations with the help of the Cheat Sheet at www.dummies.com/extras/biostatistics.

In this part . . .

  Understand what survival data is and how to handle censoring (when you don’t know whether the subject died).

  Prepare survival curves using the life-table and Kaplan-Meier methods.

  Estimate median survival times and survival rates at specified times.

  Compare survival curves between two or more groups, using the log-rank test.

  Analyze multiple predictors of survival using Cox proportional-hazards regression.