
From  Ron�n Conroy <[email protected]> 
To  [email protected] 
Subject  Re: st: Using SAMPSI for repeated observations 
Date  Thu, 23 Feb 2006 11:27:18 +0000 
On 22 Feabh 2006, at 22:59, Matt G wrote:
Your outcome variable here is change over time in a binary variable. For this reason, people who don't change are uninformative. Your hypothesis is that the proportion of the changers who change in one direction (say from 0 to 1) is greater in population 1 than in population 2.However, there's a gap  no apparent way of calculating the sample size for a twogroup comparison of PROPORTIONS where there are repeated observations in time.
© Copyright 1996–2024 StataCorp LLC  Terms of use  Privacy  Contact us  What's new  Site index 