Dear Stata Users,
thanks to Kit Baum a new version of -stcband- is
available on the SSC Archive.
This command estimates and graphs the
confidence bands for the survival function.
Note that the official
package estimates and graphs the confidence intervals of the survival
function, not the same as and probably less useful than the confidence
bands.
The difference is well illustrated for example in the book of
Klein & Moeschberger (Survival Analysis Springer 2003) and in the
Applied Survival Analysis of Hosmer, Lemeshow and May (2 ed. Wiley
2008).
In the new version the Hall-Wellner method becomes the default
method (before the default was the equal precision), the confidence
bands for the cumulative hazard function is also available and some bug
(I admit) has been fixed.
For R users the km.ci package may be an
alternative, but I prefer -stcband-
As always, any comment and
feedback will be gratly appreciated.
Best wishes.
Enzo
^^^^^^^^^^^^^^^^
Enzo Coviello
Unita' di Statistica ed Epidemiologia ASL BARI
piazza Vittorio Emanuele, 14
70054 - GIOVINAZZO (BA)
Italy
tel. fax +39 080 3357867
tel (home) +39 0883 695055
mobile 347 5016016
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