IBM Support

KM Survival Table doesn't show survival function values for some times

Technote (FAQ)


Unlike the table produced by the Life Tables procedure, the survival table in the KM or Kaplan-Meier procedure in SPSS Statistics does not show survival function estimates for all times. Why are these not shown and what value would one use for a time where a value is not shown?


The nonparametric Kaplan-Meier estimate of the survival function changes only at times where events take place. Censored case times are listed in the table, but there will not be survival function values shown. The last shown value prior to a given time continues to be the estimate for all subsequent times until the next observed event time or until the last censored time.

Related information

Need more help? Our Statistics forum is Live!

Document information

More support for: SPSS Statistics

Software version: Not Applicable

Operating system(s): Platform Independent

Reference #: 1639548

Modified date: 07 September 2016

Translate this page: