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st: new command - stnet- for net survival

From   Enzo Coviello <>
Subject   st: new command - stnet- for net survival
Date   Wed, 17 Oct 2012 17:15:02 +0200

Dear Stata Users,

thanks to Kit Baum a new command, -stnet-, for the estimation of the net survival is available for downloading from the SSC Archive.

The command implements the new method proposed by Pohar Perme et al. (Biometrics 2012) . The net survival has a particular interest for cancer registries because it does not depend on the other causes mortality and it is the appropriate survival function for international comparisons and time trends

Since the command applies a life table approach to the estimation of the net survival I checked the results produced by -stnet- through simulations. In this check a code kindly provided by Mark Rutherford has been adapted. The results have been very encouraging and are included in the zip file.

Further checks have been done by comparing results with those obtained by using rs.surv, the R function written by Maja Pohar Perme.

-stnet- applies an approach very similar to -strs-, a command available on the Paul Dickman web site. Unlike -strs- the new command (-stnet-) does not expand the data set. Therefore the memory requirements are drastically reduced and the command run faster.

Any feedback will be greatly appreciated.

Best wishes.


Enzo Coviello
Epidemiology Unit - Cancer Registry ASL BT
Piazza Umberto 1
mobile +39 347 5016016
tel +39 0883 577329
fax +39 0883 577288
Home +39 0883 695055

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