Hello all,
I've been asked to help some medical colleagues with the
analysis of data that they have collected.
Three devices were used to record measurements over 'x'
time points on 'y' number of patients. The first is blood
pressure as measured by device A, the second and third are
blood flow as measured by devices B and C. Device C has only
an arbitary scale so that a reading of 100 on patient A may
not have the same 'meaning' as 100 on patient B.
The response data for each device is in the form of the %
change from a base reading taken at time t=0.
Their question is:
Do devices 2 & 3 measure the same information? (I'm sorry
if this sounds a wee bit wooly but that's what's they've
written. Perhaps what they mean are the results produced by
the two devices 'comparable' and if so how do you go about
trying to prove it?)
I would be very grateful for any constructive input you may
have including any relevant papers or books.
Thanks,
Simon
----------------------
Simon Williams
Sir Humphry Davy Department of Anaesthesia
Bristol Royal Infirmary
Bristol BS2 8HW
Tel. 0117 9283169
Fax. 0117 9268674
e-mail:- [log in to unmask]
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