I would have guessed it would be the other way around. If you know at design time that this value will be a percentage, use the DV_PROPORTION data type with the ‘type’ attribute set to 2 (percent, denominator fixed to 100). On the other hand if you don’t know for sure (such as for some lab results or medication strengths which could be for example mg/ml or % interchangeably), you would use DV_QUANTITY.
Regards, Silje From: openEHR-clinical <[email protected]> On Behalf Of David Moner Sent: Thursday, January 3, 2019 9:37 AM To: For openEHR technical discussions <[email protected]> Cc: For openEHR clinical discussions ([email protected]) <[email protected]> Subject: Re: DV_PROPORTION vs DV_QUANTITY for % I think DV_QUANTITY is the option here. Someone could argue that % is not a proper unit, but it is, both in UCUM and SNOMED CT. DV_PROPORTION should be only used when you want to maintain the numerator and denominator explicitly separated, as a fraction, which should not be the case with percentages. But it is true that the definition of the type attribute in the specification is a bit misleading: "Indicates semantic type of proportion, including percent, unitary etc." El jue., 3 ene. 2019 a las 7:59, Bakke, Silje Ljosland (<[email protected]<mailto:[email protected]>>) escribió: Hi everyone, happy new year! We’ve just hit a question about modelling choices, how to represent percentages. We have a data type DV_PROPORTION, which can be used to represent any proportion such as a fraction or a percentage, and we have the DV_QUANTITY data type which can have % as the unit. In most existing archetypes such as the OBSERVATION.pulse_oximetry archetype, we’ve used the DV_PROPORTION data type for the percent elements, while for some reason in the draft EVALUATION.alcohol_consumption_summary archetype we’ve chosen DV_QUANTITY with the unit ‘%’ for the “Strength” element. We’ve had a look at the data types documentation (https://specifications.openehr.org/releases/RM/latest/data_types.html), and we can’t really find any guidance in the examples there. Is there any guidance about this anywhere else? Does anyone have any opinions about when to use each data type for percentages? Kind regards, Silje Ljosland Bakke Information Architect, RN Coordinator, National Editorial Board for Archetypes Nasjonal IKT HF, Norway Tel. +47 40203298 Web: http://arketyper.no<http://arketyper.no/> / Twitter: @arketyper_no<https://twitter.com/arketyper_no> _______________________________________________ openEHR-technical mailing list [email protected]<mailto:[email protected]> http://lists.openehr.org/mailman/listinfo/openehr-technical_lists.openehr.org -- David Moner Cano Web: http://www.linkedin.com/in/davidmoner Twitter: @davidmoner Skype: davidmoner
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