Dear Saran
Usually, modification of the wording of a validated tool such as the SF-36
would invalidate it. You would probably have to validate your shortened
phone questions against the full paper version on the same individuals and
do the appropriate correlations to prove validity.
Best wishes
Roy Powell
----- Original Message -----
From: Wilkins-Cook, Saran <[log in to unmask]>
To: <[log in to unmask]>
Sent: 22 October 1999 16:41
Subject: SF-36 and Phone Survey
> Can anyone give me some insight as to whether it is okay to modify the
> wording of the SF-36 in phone survey? We are doing an outcomes study in
> which we are using the SF-36 as our measurement tool. The baseline data
is
> collected on site from the patient as they read and answer the survey.
> However, there is such a low response rate for follow-up data that we are
> resorting to calling to collect the follow-up data. However, we fear that
> some of the questions are so lengthy that the patient will tune out. Is
it
> okay to shorten the questions and state in the protocol that we have
> modified the survey? I am concerned that the baseline measurement won't
be
> valid against the follow-up because of different methods of collection.
>
> Saran Wilkins-Cook
> Performance Improvement
> (714) 456 8961
> Pager (714) 506-8946
>
>
>
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