st: new command - stnet- for net survival

[Enzo Coviello <enzo.coviello@tin.it>]

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


--
Enzo Coviello
Epidemiology Unit - Cancer Registry ASL BT
Piazza Umberto 1
76121 BARLETTA (BT)
Italy
mobile +39 347 5016016
tel +39 0883 577329
fax +39 0883 577288
Home +39 0883 695055

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