Quality and Reliability Methods - SAS

Chapter 19 Reliability and Survival Analysis 359
Univariate Survival Analysis
Note that Failure Plot replaces the Reverse Y Axis command found in older versions of JMP (which is
still available in scripts).
Figure 19.12 Survival Plot and Failure Plot of the Rats data
Plot Options is a submenu that contains the following options. The first five options (Show Points,
Show Kaplan Meier, Show Combined, Show Confid Interval, Show Simultaneous CI) and the last
two options (Fitted Survival CI, Fitted Failure CI) pertain to the initial survival plot. The other five
(Midstep Quantile Points, Connect Quantile Points, Fitted Quantile, Fitted Quantile CI Lines,
Fitted Quantile CI Shaded) only pertain to the distributional plots.
– Show Points hides or shows the sample points at each step of the survival plot. Failures are shown at
the bottom of the steps, and censorings are indicated by points above the steps.
– Show Kaplan Meier hides or shows the Kaplan-Meier curves.
– Show Combined displays the survival curve for the combined groups in the Survival Plot.
– Show Confid Interval shows the pointwise 95% confidence bands on the survival plot for groups
and for the combined plot when it is displayed with the Show Combined option.
– When Show Points and Show Combined are selected, the survival plot for the total or combined
sample shows as a gray line. The points also show at the plot steps of each group.