Comparing two or more survival functions

Plot multiple survival curves to make comparisons between them.

1. Select a cell in the dataset.
2. On the Analyse-it ribbon tab, in the Statistical Analyses group, click Survival/Reliability, and then click Compare Survival Functions.
   The analysis task pane opens.
3. In the Y (time to event) drop-down list, select the time until the event of interest variable.
4. Optional: In the Censor drop-down list, select the state variable that indicates whether the time was censored or if the event of interest occured, and then in the Event drop-down list, select the state that indicates the time was censored.
5. In the X (factor) drop-down list, select the grouping variable.
6. In the Survival function task panel, under the Equality of survival functions hypothesis test check box, in the Test drop-down list, select the statistical test to perform.
7. Click Calculate.