Andersson Richard wrote: > Hello everybody! > > Do anyone know of any existing OBSERVATION that uses the Person State with History? > > I haven?t found any, and I try to understand the difference between Person State with History-events and the events that is mandatory within data History.
Have a look at Page 57/58: http://www.openehr.org/svn/specification/TAGS/Release-1.0.1/publishing/architecture/rm/ehr_im.pdf State information is optional, and is not needed if the data are meaningful on their own. If it is recorded, it can either be as a History of its own (i.e. using the OBSERVATION.state atttribute described above), or else as state values within the EVENT instances in the OBSERVATION.data History. Both methods are useful in different circumstances. A separate state history is more likely to be used in a correlation study such as a sports medicine study on heartrate with respect to specific types of exercise. In this method, the state information is a History of Events whose times and widths neednot match those of the History in the data attribute. The state data under this approach generally express the condition of the subject in absolute terms, i.e. they are standalone statements about the subject?s state at certain points in time, such as ?walking on treadmill 10km/h, 10o incline?. The other method will be used in most general medicine, e.g. for recording fasting and post glucose challenge states of a patient undergoing a glucose tolerance test. (See the Data Structures Information Model for more details). State values stored within the data History represent the situation in the subject at the time of the Event within the History and usually in relation to it, for example ?post 8 hour fast?. Recording the latter example in an independent state History would require an Event of 8 hours? duration called ?fast?. The latter would be technically still correct, but would be very unnatural to most clinicians. FIGURE 21 illustrates the two methods of recording state. I hope that clarifies the differences, but I am not aware of an "official" openEHR archetype that uses the first approach. Sebastian > Regards > > Richard Andersson > > University Hospital of Lund, Sweden > > > > _______________________________________________ > openEHR-clinical mailing list > openEHR-clinical at openehr.org > http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-clinical > >
