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Re: st: ssmenu, stcox and sample size estimates


From   Richard Goldstein <richgold@ix.netcom.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: ssmenu, stcox and sample size estimates
Date   Wed, 18 Aug 2010 10:49:58 -0400

well, try the update version then; typing -findit art- will get you
there, including the article

Rich

On 8/18/10 10:45 AM, Simon wrote:
> <>
> 
> I've looked and under >user I have >Data, >Graphics and >Statistics each
> pointing to a blank sub menu
> 
> Simon
> 
> 
> On 18/08/2010 15:37, Richard Goldstein wrote:
>> it should be one of the items under "User" in the menu bar -- have you
>> checked there?
>>
>> Rich
>>
>> On 8/18/10 10:33 AM, Simon wrote:
>>> <>
>>>
>>> I have successfully installed Royston&  Babiker's ssmenu (SJ2-2 st0013.
>>>   A menu-driven facility for complex sample size) and following the help
>>> file ran -ssmenu on- to which I received "Study size menu on.  The
>>> menubar has been changed." However, I cannot see any change in the menu
>>> bar. Is this compatible with Stata 11MP? If not, could someone suggest
>>> an alternative?
>>>
>>> I have data from a pilot RCT, the unit of allocation is premises and
>>> each premises is subject to multiple failures. Data is described at the
>>> daily level with half of the premises (n=16) receiving the intervention
>>> half way through, the other half not. So I have run:
>>>
>>> stset date, fail(fail) exit(time .) id(premises) enter(date0)
>>> xi: stcox intervention,  efron robust schoenfeld(sch*) scaledsch(sca*)
>>> cluster(loc)
>>>
>>> And from this I would like to estimate the number of premises required
>>> in the full study.
>>>
>>> Wishing you well
>>> Simon
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