Hi All
The reason we introduced the assumed value in the Observation.State was to deal with the fact that many variables may be introduced in regard to the state of the person when an observation is made - clothing, fasting, post-challenge, at rest, on exertion, asleep, upright/sitting/lying etc. Actually these 'state' variables are not recorded but are largely assumed to be of a certain value. So we do not need to say that an ECG is at rest - but we do need to say that it was an exercise ECG. The state variable for exertion is assumed to be at rest unless stated. A blood pressure which is stand alone is assumed to be sitting in most instances. The archetype allows formal expression of what the relevant state variables are and what they are assumed to be when they are missing. This is helpful for standardisation of observations without massive data collection constraints. Cheers, Sam From: openEHR-technical [mailto:[email protected]] On Behalf Of Ian McNicoll Sent: Tuesday, 8 January 2013 12:57 AM To: For openEHR technical discussions Subject: Re: defaultValue/assumedValue in CPrimitive. Hi Bert, Assumed value: This is a statement in an archetype which asserts what should happen if a value is missing. It can really only apply safely to an element is Observation/State or in a Cluster archetype intended for use in state. Essentially this is a design-time statement of 'clinical knowledge' and should not end up in data. Personally I don't use this very often as it can be difficult to know when/how that knowledge can be safely applied. One reasonable example is in OBSERVATION.body_weight.v1 where the 'State of Clothing' has an assumed value of 'Lightly Dressed'. Default value: Generally applied at template level as it will often differ depending on the exact use-case. A default value does appear in run-time data. As Thomas,says in his reply, Assumed value has rarely been used but it can sometimes be helpful. On 7 January 2013 13:52, Bert Verhees <bert.verhees at rosa.nl <mailto:bert.verhees at rosa.nl> > wrote: Please can some one short explain what the difference is between assumedValue and defaultValue in CPrimitive? Thanks Bert _______________________________________________ openEHR-technical mailing list openEHR-technical at lists.openehr.org <mailto:openEHR-technical at lists.openehr.org> http://lists.openehr.org/mailman/listinfo/openehr-technical_lists.openehr.or g -- Dr Ian McNicoll office +44 (0)1536 414 994 fax +44 (0)1536 516317 mobile +44 (0)775 209 7859 skype ianmcnicoll ian.mcnicoll at oceaninformatics.com <mailto:ian.mcnicoll at oceaninformatics.com> Clinical Modelling Consultant, Ocean Informatics, UK Director openEHR Foundation www.openehr.org/knowledge <http://www.openehr.org/knowledge> Honorary Senior Research Associate, CHIME, UCL SCIMP Working Group, NHS Scotland BCS Primary Health Care www.phcsg.org <http://www.phcsg.org> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openehr.org/pipermail/openehr-technical_lists.openehr.org/attachments/20130108/aa04dec1/attachment.html>
