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Re: st: Statistical significance of standardized rates


From   Nick Cox <njcoxstata@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Statistical significance of standardized rates
Date   Thu, 4 Apr 2013 16:57:09 +0100

-dstdize- is a command, not a function.

Before you proceed further, note that the confidence intervals appear
to be of essentially zero length. That seems implausible, but if it's
true, any difference you like is significant at conventional levels.
Getting a P-value is moot. However, I'd be suspicious without being
sure that the instructions were correct.

Nick
njcoxstata@gmail.com

On 4 April 2013 16:44, Karman Tandon <karmantandon@gmail.com> wrote:
> Hi,
>
> I've used the dstdize function to standardize/adjust across a number
> of variables. My data looks like this:
>
> Summary of Study Populations:
>      quartile        N      Crude     Adj_Rate       Confidence Interval
>  --------------------------------------------------------------------------
>         1           290   0.196552     0.060000    [  0.060000,    0.060000]
>         2           233   0.124464     0.030526    [  0.030526,    0.030526]
>         3           216   0.087963     0.020000    [  0.020000,    0.020000]
>         4           210   0.066667     0.014737    [  0.014737,    0.014737]
>
> How do I determine p-values for the significance of the adjusted rates
> compared to one another?
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