SNOMED hierarchy like Read 3 onwards is hidden in parentage tables so it is
impossible to check i.e the codes are NOT hierarchical. The other major
problem is that symptoms signs and diseases are not distinguished from each
other - they are just 'clinical findings'. Another thing is they have not
tidied up all the duplicates in Read like:
1467|H/O: anorexia nervosa|
E271.|Anorexia nervosa|
Eu500|[X]Anorexia nervosa|
(there are thousands of these) but just bundled them all in not mapped them
or anything useful like that.
I have checked 10% of the symptom/sign hierarchies that I am interested in
(ie useful to clinicians)and consistently found high proportion (80%)errors
of grouping, classification, mapping and wrong (assumed by grouping)
definition or understanding of meaning and use of terms.
Love Rog
-----Original Message-----
From: GP-UK [mailto:[log in to unmask]]On Behalf Of Ray Simkus
Sent: 16 May 2004 21:28
To: [log in to unmask]
Subject: Re: The New Single Record - and Coding
SNOMED is hierarchical and multiaxial. It uses about 12 axis and also uses
attributes.
http://www.snomed.org/snomedct/what_is.html
On 16 May 2004 at 21:08, Mary Hawking wrote:
>
> However, my understanding is that whereas Read is hierarchical - and
> SNOWMED isn't.
>
>
--
Ray Simkus
4041 200B Street
Langley, BC
V3A 1P1
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