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st: comparing differences of rate differences

From   Ricardo Ovaldia <>
Subject   st: comparing differences of rate differences
Date   Tue, 9 Mar 2004 16:15:12 -0800 (PST)

Dear all,

This is not really a Stata question but I have been
unsuccessful finding a satisfactory answer. Any
assistance will be greatly appreciated. 

I have computed hospital admission rates for two
different years (1996, 2002). To compare these rates I
can simply use Stata’s –prtest- (or –tabulate- ) to
test whether these rates differ.  

Now, if I compute these rates separately for Whites
and Blacks, how can I test if the change in rates from
1996 to 2002 is different for whites than for blacks?

Thank you,

Ricardo Ovaldia, MS
Oklahoma City, OK

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