Thanks for this information, Kathy.  Makes sense to me.  Myra

>From: Kathy Yonkers <[EMAIL PROTECTED]>
>Reply-To: The Cavalier King Charles Spaniel List
><[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: [CKCS-L] Heart info link
>Date: Wed, 24 Apr 2002 13:48:32 -0400
>
>Myra...In that study which was retrospective in nature, there are some
>problems with the selection (very small convenience) and standardization of
>the testing (some where from vet records of decreased dogs and other by
>examination)...BUT this is allowed in this type of  design...in other
>words...when you see this design when you are performing a literature
>review, you know there is a danger of selection bias and other errors.
>
>Retrospective studies are used to generated further questions for
>investigation...not to draw concrete universal conclusions.
>
>So Myra...you are correct in asking questions...that is how we generate
>thought for further investigations.
>
>Take care,
>Kathy Yonkers
>
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Myra Savant  Gardengate Cavaliers


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