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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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302 COXREG<br />

• Cases with negative values on the dependent variable are automatically treated as missing<br />

and are excluded.<br />

• To be included in the model, a case must have nonmissing values for the dependent,<br />

status, strata, and all independent variables specified on the COXREG command.<br />

EXCLUDE Exclude user-missing values. User-missing values are treated as missing.<br />

This is the default if MISSING is omitted.<br />

INCLUDE Include user-missing values. User-missing values are included in the analysis.<br />

PRINT Subcommand<br />

By default, COXREG prints a full regression report for each step. You can use the PRINT<br />

subcommand to request specific output. If PRINT is not specified, the default is DEFAULT.<br />

DEFAULT Full regression output including overall model statistics and statistics for<br />

variables in the equation and variables not in the equation. This is the<br />

default when PRINT is omitted.<br />

SUMMARY Summary information. The output includes –2 log-likelihood for the initial<br />

model, one line of summary for each step, and the final model printed with<br />

full detail.<br />

CORR Correlation/covariance matrix of parameter estimates for the variables in<br />

the model.<br />

BASELINE Baseline table. For each stratum, a table is displayed showing the baseline<br />

cumulative hazard, as well as survival, standard error, and cumulative hazard<br />

evaluated at the covariate means for each observed time point in that stratum.<br />

CI (value) Confidence intervals for e . Specify the confidence level in parentheses.<br />

The requested intervals are displayed whenever a variables-in-equation table<br />

is printed. The default is 95%.<br />

β<br />

ALL All available output.<br />

• Estimation histories showing the last 10 iterations are printed if the solution fails to<br />

converge.<br />

Example<br />

COXREG SURVIVAL WITH GROUP<br />

/STATUS = SURVSTA (1)<br />

/STRATA = LOCATION<br />

/CATEGORICAL = GROUP<br />

/METHOD = ENTER<br />

/PRINT ALL.<br />

• PRINT requests summary information, a correlation matrix for parameter estimates, a<br />

baseline survival table for each stratum, and confidence intervals for e with each<br />

variables-in-equation table, in addition to the default output.<br />

β

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