SAS/STAT 9.22 User's Guide:: The PHREG Procedure by SAS Publishing

By SAS Publishing

The PHREG technique plays regression research of survival information according to the Cox proportional dangers version and its extensions.

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Extra resources for SAS/STAT 9.22 User's Guide:: The PHREG Procedure

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You can choose one of the following two options to specify the partition of the time axis into intervals of constant baseline hazards: NINTERVAL=number N=number specifies the number of intervals with constant baseline hazard rates. PROC PHREG partitions the time axis into the given number of intervals with approximately equal number of events in each interval. INTERVAL=(numeric-list) specifies the list of numbers that partition the time axis into disjoint intervals with constant baseline hazard in each interval.

BAYES Statement ✦ 5187 GROUPBY=PARAMETER is the default. SMOOTH displays a fitted penalized B-spline curve each trace plot. UNPACKPANEL UNPACK specifies that all paneled plots be unpacked, meaning that each plot in a panel is displayed separately. The plot requests include the following: ALL specifies all types of plots. PLOTS=ALL is equivalent to specifying PLOTS=(TRACE AUTOCORR DENSITY). AUTOCORR displays the autocorrelation function plots for the parameters. DENSITY displays the kernel density plots for the parameters.

The quantity value must be a positive number, with a default value of 1E–4. The PLCONV= option has no effect if profile-likelihood confidence intervals (CL=PL) are not requested. PLMAXIT=n specifies the maximum number of iterations to achieve the convergence of the profile-likelihood confidence limits. By default, PLMAXITER=25. If convergence is not attained in n iterations, the corresponding profile-likelihood confidence limit for the hazard ratio is set to missing. The PLMAXITER= option has no effect if profile-likelihood confidence intervals (CL=PL) are not requested.

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