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Re: st: New package on SSC: -eclpci-


From   Roger Harbord <roger.harbord@bristol.ac.uk>
To   statalist@hsphsun2.harvard.edu, Nicola Orsini <nicola.orsini@imm.ki.se>
Subject   Re: st: New package on SSC: -eclpci-
Date   Mon, 27 Jun 2005 17:51:29 +0100

--On 27 June 2005 12:53 +0200 Nicola Orsini <nicola.orsini@imm.ki.se> wrote:

Thanks to Marcello Pagano who mantains the Statalist and to Kit Baum for
a new Stata package -eclpci- available from SSC.

-eclpci- calculates exact and approximate confidence limits for a
Poisson count (#obs). It provides a Standardized Mortality Ratio
(SMR=#obs/#exp) and its confidence limits if the expected number of
events (#exp) is specified.  It is an immediate command.
Hi Nicola,

Could you clarify how this differs from official Stata's -cii #exposure #events , poisson- ?


. eclpci 10 1000, format(%9.0g)

SMR: .01 95% CI[ .0047954, .0183904]

. cii 1000 10, poisson

-- Poisson Exact --
Variable | Exposure Mean Std. Err. [95% Conf. Interval]
---------+------------------------------------------------------
| 1000 .01 .0031623 .0047954 .0183904



Thanks,
Roger.

--
Roger Harbord
Department of Social Medicine, University of Bristol
http://www.epi.bris.ac.uk


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