I am forwarding this for a colleague ("Charles Lantz, DC, PhD"
<[log in to unmask]>) who is not a member of the list.
To Stephen Brealey (& Robert Newcomb)
I just got into the loop of this discussion via Stephen Perle and I find
Kappa fascinating!! I particularly like Dr Newcomb's approach to Kappa
analysis and would like to hear more about the procedures for managing
multiple 2x2 matrices. I would like to know more about this aspect.
Regarding the design for the radiologist vs radiographer, I have some
additional recommendations. A much stronger design would ensue if you
added a second rater of each category. You could then compare within
specialty and between specialty reliabilities and perform a reliability
mapping similar that described in Spine 1999; 24(11):1082-1089 for
inter- and intra-examiner reliabilities. That way you could compare the
inter and intra-examiner reliabilities for a better perspective. It
would also be interesting to determine the intra-examiner reliabilities
for the individual examiners...perhaps on a smaller subset of subjects.
Such a simple design would provide for substantial power in the
analysis, it would seem to me (power taken in a
more generic, rather than statistical sense...but the latter could apply
as well).
Charles Lantz, DC, PhD <[log in to unmask]>
--
_____________________________________________________________________
Stephen M. Perle, D.C. "A man who knows that
Assistant Professor of Clinical Sciences he is a fool is not
University of Bridgeport College of Chiropractic a great fool."
Bridgeport, CT 06601 Chuang Tzu
E-mail: [log in to unmask]
http://www.bridgeport.edu/chiro/
_____________________________________________________________________
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|