Hi,
I would like to fit a continuation ratio model to a 6-level outcome
using ocratio. I would then like to assess the constancy of model
parameters by fitting a series of logistic models
A quick lit search is showing variability in which comparisons are being
made with a CR model.
e.g. for 3-level outcome - 1/2/3
Armstrong and Sloan (1989)
1 versus 2 & 3
2 versus 3
Manor, Matthews and Power (2000)
1 versus 2
1 & 2 versus 3
Greenland (1994)
2 & 3 versus 1,2 & 3
3 versus 2 & 3
I imagine these are all permitted alternatives, but i would like to know
which particular comparisons are made using ocratio so I can fit the
appropriate logistic models.
Any help gratefully received
cheers
Jon
--------------------------------------------------
Dr Jon Heron
Statistics Team Leader
ALSPAC, Dept of Social Medicine
24 Tyndall Avenue
Bristol BS8 1TQ
Tel: 0117 3311616
Fax: 0117 3311704
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