More Information

Kaplan-Meier Survival Analysis

Supported Worksheet Layout

To perform a Kaplan-Meier analysis, each survival data set must include:

Subjects Remaining at Risk Beyond Completion of the Study

If the Kaplan-Meier curve is plotted without taking into account the number of subjects remaining at risk beyond completion of the study, the shape of the curve will be unaffected, but the survival probability values will be affected.

Analysis Output

Logrank Significance Test

Survival curves compare the cumulative probability of survival at any specific time. When we have generated two or more survival curves, the logrank test is used to determine whether the differences in survival between groups, treatments, etc., are more than we would expect by chance alone.

Comparying Kaplan-Meier Survival Curves From Different Data Sets

A chart instance from raw survival data analysis allows displaying survival curves from single or multiple groups belonging to one data set; you may want to compare survival curves from multiple groups belonging to different data sets. Aabel allow this by: