st: using stci with weighted data; and multiple test procedure

[Douglas Crawford <dcrawfo@itsa.ucsf.edu>]

As a new Stata user please forgive me if the following questions are 
tirsome.

I have count time data that I have converted to st data via ctset, 
cttost.  I then have graphed and summarized the resulting data without 
difficulty.  However, when I try and use the stci function I get a 
error message indicating that weighted data is not permitted.  How 
should I proceed?

Seondly, I have several treatment groups.  To evaluate the significance 
of the differences in lifespans between the groups I performed a 
logrank test.  Now I would like to perform a series of pairwise 
comparisons between the groups.  What is the appropriate procedure to 
protect against multiple comparisons (is there something like 
Bonferroni or Scheffe that should follow the logrank)?

Thank you for your help


Douglas Crawford

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