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Re: [Gnumed-devel] measurement tooltip
From: |
Karsten Hilbert |
Subject: |
Re: [Gnumed-devel] measurement tooltip |
Date: |
Sun, 21 Jun 2009 11:58:10 +0200 |
> > Say:
> >
> > normal range = 9.5-10
> >
> > Result = 11
> >
> > - result is 1.1 times the upper limit
> > - result deviates by 2 times the normal range
>
> I like the concept of "times" the upper limit (or % of lower limit)
> (maybe % of mid-reference range)
I would argue for % of lower limit because if it *was* the lower limit
we'd be saying it is within normal range, in extension "% of lower limit"
means "% of what is considered normal".
> I have only ever seen *clinical* reference made to "times the upper
> limit".
We can calculate and display references to both standard normal and
clinical limits because we allow tracking both on each measurement.
> I have never come upon a reference guideline clinical value for
> "deviates" as in the "delta"... clinically,
Well, consider the above example. While it is only 1.1 times the upper
limit the deviation is by 2 times the *bandwidth* of the normal range.
1.1 may not sound like much but the deviation from the upper limit is
200% of the variation of the value in the normal population ! This
provides some measure in cases of high absolute values of a very narrow
normal range, say, 110-113 is normal. 117 isn't that much higher but
it deviates much more than the normal variation would allow for.
> 1. Suggest leaving out "of normal" and simply say "upper limiti
> since, in some cases, we are talking a (therapeutic) "reference
> range" or (in patients in whom we have customized the values) we have
> set a "target range"
Well, we support both at the same time :-) Hence
both calculations and thus precise wording.
> 2. I would omit "deviates <x> times" unless it is made clearer
I am open to suggestions on clearer wording.
> a deviation (delta) in your calculation, as you seem to be taking the
> midpoint (9.75) and expressing the elevated result (11) to be one and
> a fraction "times" the normal range
ah, no, it's times the upper limit (1.1 times 10 is 11)
BTW, I chanced upon this idea when I did the very same calculation
by hand two days ago on a certain patient's data - including the
bandwidth deviation.
Karsten
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- [Gnumed-devel] measurement tooltip, Karsten Hilbert, 2009/06/20
- Re: [Gnumed-devel] measurement tooltip, Jim Busser, 2009/06/20
- Re: [Gnumed-devel] measurement tooltip,
Karsten Hilbert <=
- Re: [Gnumed-devel] measurement tooltip, Elizabeth Dodd, 2009/06/21
- Re: [Gnumed-devel] measurement tooltip, Jim Busser, 2009/06/21
- Re: [Gnumed-devel] measurement tooltip, Karsten Hilbert, 2009/06/21
- Re: [Gnumed-devel] measurement tooltip, Rogerio Luz Coelho, 2009/06/22
- Re: [Gnumed-devel] measurement tooltip, Karsten Hilbert, 2009/06/22
- Re: [Gnumed-devel] measurement tooltip, Karsten Hilbert, 2009/06/21