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.

Document information

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SPSS Statistics

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Not Applicable

Operating system(s):

Platform Independent

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