SAS PROC LIFETEST SURVIVAL PLOT

This option has no effect if there is only one stratum. This option is not needed when the life-table method is used to compute the survival estimates, since the plot of censored observations is not produced. You can specify one of the following bandwidth-options. For example, to send the plot output to a printer with the IBM graphics character set 1 or 2 , specify. Specifies a list of time points to display the survival estimate. If there are no tied event times, this estimator is the same as the Breslow estimator. The choices are as follows:

The description does not appear in the plots. Specifies an input data set that contains variables for local annotation. Names an output data set to contain survival estimates and confidence limits. The initial interval is assumed to start at zero whether or not zero is specified in the list. Collett and Lachin refer it as the complementary log-log transformation. You can specify one of the following bandwidth-options. This option is ignored if the largest observed time is an event time.

If you use hexadecimals, you must put an x after the closing quote. The options listed in Table The Breslow estimator is the exponentiation of the negative Nelson-Aalen estimator of the cumulative hazard function.

You can customize the display by using the following survival-options:.

The test requires that a pivot for sweeping a covariance matrix be oifetest least this number times a norm of the matrix. When you specify only one plot-requestyou can omit the parentheses around the plot-request. HW displays the Hall-Wellner confidence band. The description does not appear in the plots. For example, to send the plot output to a printer with the IBM graphics character set 1 or 2specify.

Names an output data set to contain survival estimates and confidence sa. The mean survival time can be shown to be the area under the Kaplan-Meier survival curve. This lietest has no effect for the life-table method. Specifies a list of time points to display the survival estimate.

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You can specify the following hazard-optionsbut only the CL option can be used for the life-table method:. This option is useful when only an output data set is needed.

The default value is 0. The default is WORK.

Suppresses the Number Left column in the survival estimate table. These endpoints must all be nonnegative numbers. Collett and Lachin refer it as the complementary log-log transformation. This zurvival is not needed when the life-table method is used to compute the survival estimates, lifetrst the plot of censored observations is not produced.

This is also referred to as the log cumulative hazard transformation since it is applying the logarithmic function to the cumulative hazard function. The following table depicts the behavior regarding the type of graphics produced:. Displays only the estimate for the smallest time in each interval. The third character defines the tick mark for the axes, and the fourth pifetest defines the lower left corner of the plot.

See the section Missing Values for details. Previous Page Next Page. For example, durvival both the FAILURE and CL options are specified, the plot displays the failure curves as well as the pointwise confidence limits for the failure functions.

The event time that corresponds to the beginning of the time interval is displayed along with its survival estimate. HW outputs the Hall-Wellner confidence bands.

SAS/STAT(R) 14.1 User’s Guide

You can specify one of the following keywords. If there is more than one local minimum in the interval, there is no guarantee that the local minimum found is also the global minimum. This option affects only the displayed plots and has no effect on any calculations. You can use the following keywords:. The FH estimator is a tie-breaking modification of the Breslow estimator. The default value is The string should be four characters.

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ALL produces all appropriate liretest. The default value is 1E— When you porc only one plot-request, you can omit the parentheses around the plot-request.

Specifies an input data set that contains variables for local annotation.

SAS/STAT(R) User’s Guide

ODS Graphics is now the preferred method of requesting graphics. The plot-requests include the following: Only the number of censored and saa times, plots, and test results is displayed. For example, you can display the number of subjects at risk in a survival plot through ODS Graphics, but such a feature is not available in traditional graphics or line printer plots.

By default, the most recently created SAS data set is used. Specifies the time limit used to estimate the mean survival time and its standard error.

The default is the sjrvival observed event time. Pointwise confidence limits are displayed optionally by specifying the CL option. EP displays the equal-precision band. You can use the following keywords: Adds the number of subjects at sutvival to the survival estimate table.

The LIFETEST Procedure

Valid time-limit values are as follows: PDF P plots the estimated probability density function versus time life-table method only. However, if the largest observed time in the data is censored, the area under the survival curve is not a closed area. The default value is the time origin.