STATUS Subcommand (COXREG command)

To determine whether the event has occurred for a particular observation, COXREG checks the value of a status variable. STATUS lists the status variable and the code for the occurrence of the event.

  • Only one status variable can be specified. If multiple STATUS subcommands are specified, COXREG uses the last specification and displays a warning.
  • The keyword EVENT is optional, but the value list in parentheses must be specified.
  • The value list must be enclosed in parentheses. All cases with non-negative times that do not have a code within the range specified after EVENT are classified as censored cases—that is, cases for which the event has not yet occurred.
  • The value list can be one value, a list of values separated by blanks or commas, a range of values using the keyword THRU, or a combination.
  • If missing values occur within the specified ranges, they are ignored if MISSING=EXCLUDE (the default) is specified, but they are treated as valid values for the range if MISSING=INCLUDE is specified.
  • The status variable can be either numeric or string. If a string variable is specified, the EVENT values must be enclosed in apostrophes and the keyword THRU cannot be used.

Example

COXREG VARIABLES = SURVIVAL WITH GROUP
  /STATUS SURVSTA (3 THRU 5, 8 THRU 10).
  • STATUS specifies that SURVSTA is the status variable.
  • A value between either 3 and 5 or 8 and 10, inclusive, means that the terminal event occurred.
  • Values outside the specified ranges indicate censored cases.