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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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792 KM<br />

ID Subcommand<br />

ID specifies a variable used for labeling cases. If the ID variable is a string, KM uses the string<br />

values as case identifiers in the KM table. If the ID variable is numeric, KM uses value labels<br />

or numeric values if value labels are not defined.<br />

• ID is the first column of the KM table displayed for each combination of factor and stratum.<br />

• If a string value or a value label exceeds 20 characters in width, KM truncates the case<br />

identifier and displays a warning.<br />

PRINT Subcommand<br />

By default, KM prints survival tables and the mean and median survival time with standard<br />

errors and confidence intervals if PRINT is omitted. If PRINT is specified, only the specified<br />

keyword is in effect. Use PRINT to suppress tables or the mean statistics.<br />

TABLE Print the KM tables. If PRINT is not specified, TABLE, together with MEAN,<br />

is the default. Specify TABLE on PRINT to suppress the mean statistics.<br />

MEAN Print the mean statistics. KM prints the mean and median survival time with<br />

standard errors and confidence intervals. If PRINT is not specified, MEAN,<br />

together with TABLE, is the default. Specify MEAN on PRINT to suppress the<br />

KM tables.<br />

NONE Suppress both the KM tables and the mean statistics. Only plots and comparisons<br />

are printed.<br />

Example<br />

KM LENGTH BY SEXRACE<br />

/STATUS=EMPLOY EVENT (1) LOST (3,5 THRU 8)<br />

/STRATA=LOCATION<br />

/PLOT=SURVIVAL HAZARD<br />

/PRINT=NONE.<br />

• PRINT=NONE suppresses both the KM tables and the mean statistics.<br />

PERCENTILES Subcommand<br />

PERCENTILES displays percentiles for each combination of factor and stratum. Percentiles<br />

are not displayed without the PERCENTILES subcommand. If the subcommand is specified<br />

without a value list, the default is 25, 50, and 75 for quartile display. You can specify any<br />

values between 0 and 100.

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