MISSING Subcommand (COXREG command)

MISSING controls missing value treatments. If MISSING is omitted, the default is EXCLUDE.

• Cases with negative values on the dependent variable are automatically treated as missing and are excluded.
• To be included in the model, a case must have nonmissing values for the dependent, status, strata, and all independent variables specified on the COXREG command.

EXCLUDE. Exclude user-missing values. User-missing values are treated as missing. This is the default if MISSING is omitted.

INCLUDE. Include user-missing values. User-missing values are included in the analysis.