Hi Leo Gunther says that these units are not proper units.
http://www.xkaw.com/Education_Reference/Science_Mathematics.asp?id=2276318 There's a possible question of scope alignment here. It's kind of tantamount to saying that a measure like that is not a proper measurement. I don't think I agree with that. To pursue the UCUM issue, you need to make at ticket at http://www.unitsofmeasure.org/ I think that there's a tension here between the notion of purity from UCUMs point of view, and the use of UCUM in the measurement data types (PQ in HL7 v3 and DV_QUANTITY in openEHR - both have the same scope and the same usage of UCUM) Also see http://www.unitsofmeasure.org/wiki/ProcedureDefinedUnits Grahame On Fri, Apr 29, 2011 at 9:20 AM, Grahame Grieve <grahame at healthintersections.com.au> wrote: > There's some question about whether such a funky unit is > a proper unit. It does look rather like a statistical imagination > to me, rather than an actual unit. > > I'm not sure where the right place to discuss this is. I'll let > you know when I find out. > > Grahame > > > On Fri, Apr 29, 2011 at 12:50 AM, Leonardo Moretti > <lmoretti at noemalife.com> wrote: >> >> Hi >> there are a lots of scientific publications treating the indexations of left >> ventricular mass (LVM). >> I can link some abstracts, but the whole PDF documents are not public: >> - http://www.nature.com/jhh/journal/v23/n11/full/jhh200916a.html >> - http://www.ncbi.nlm.nih.gov/pubmed/11729247 >> or here >> https://www.stanford.edu/group/ccm_echocardio/cgi-bin/mediawiki/index.php/Left_ventricle_wall_thickness >> >> It can be used to detect left ventricular hypertrophy. >> You can google "mass/height^2.7" to find more references. >> >> Thanks for your help. >> leo >> >> >> Grahame Grieve-3 wrote: >>> >>> Hi Leo >>> >>> Can you please provide some references to show the use of height^2.7? >>> >>> Grahame >>> >>> >>> On Thu, Apr 28, 2011 at 6:47 PM, Moretti Leonardo >>> <lmoretti at noemalife.com> wrote: >>>> In cardiology, left ventricular mass (LVM) is often indexed to better >>>> identify left ventricular hypertrophy. >>>> Possible indexations are: >>>> - LVM/BSA (body surface area) >>>> - LVM/height >>>> - LVM/height^2.7 >>>> The first and the latter are often used. >>>> The units of measurement of the latter is usually g/m2.7 >>>> [gram/(meter^2.7)]. >>>> >>>> In DV_QUANTITY, "units" attribute should be expressed in UCUM unit >>>> syntax. >>>> UCUM doesn't allow not integer exponent (see >>>> http://aurora.regenstrief.org/~ucum/ucum.html#section-Syntax-Rules), so I >>>> have the problem that I cannot express the units as g/m2.7. >>>> >>>> Any suggestion to solve this problem!? >>>> Best regards >>>> leo >>>> _______________________________________________ >>>> openEHR-technical mailing list >>>> openEHR-technical at openehr.org >>>> http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical >>>> >>>> >>> >>> >>> >>> -- >>> ----- >>> http://www.healthintersections.com.au / >>> grahame at healthintersections.com.au / +61 411 867 065 >>> _______________________________________________ >>> openEHR-technical mailing list >>> openEHR-technical at openehr.org >>> http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical >>> >>> >> >> -- >> View this message in context: >> http://old.nabble.com/Unable-to-express-an-unit-of-measurements-in-UCUM-syntax-tp31494533p31497302.html >> Sent from the openehr-technical mailing list archive at Nabble.com. >> >> _______________________________________________ >> openEHR-technical mailing list >> openEHR-technical at openehr.org >> http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical >> > > > > -- > ----- > http://www.healthintersections.com.au / > grahame at healthintersections.com.au / +61 411 867 065 > -- ----- http://www.healthintersections.com.au / grahame at healthintersections.com.au / +61 411 867 065
