IgE levels

6 replies [Last post]
By Lebovitz on Fri, 11-18-05, 03:18

I notice that some people are worried with IgE levels of 100 or less. What kind of reaction do you notice at that level? My son's level is well over 20,000 and I constantly worry! LL from Arizona

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By vlcarnes on Fri, 11-18-05, 03:32

Are we talking about the same scale? Because Class 6 (the highest level) only shows results up to 100. I'm not sure I understand how you determine a result higher. I'm very interested in this because I would love to determine my daughter exact IgE level. All we know is >100.

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By Carefulmom on Fri, 11-18-05, 03:33

There are different kinds of IgE tests with different ranges for normal. The kind that most people are talking about only measures up to 100 which is a class 6 (the highest/worst class). You must be referring to a different kinds of test or different units of measurement. I pulled out my dd`s cap rast and the units are kU/L (since you are a pharmacist you can probably figure that out---probably kilounits per liter?). Normal goes up with age, so here is the scale for age 9 (that was her age when this was done).
<0.10 is class 0 or negative
0.10 - 0.34 is class 0/1 or equivocal/borderline
0.35 - 0.69 is class 1 or low positive
0.70 - 3.4 is class 2 or moderate positive
3.5 - 17.4 is class 3 or high positive
17.5 - 49.9 is class 4 or very high positive
50.0 - 99.9 is class 5 or very high positive
>100 is class 6 or very high positive

Yours must be using a different scale or maybe it is a rast instead of a cap rast? I remember dd had a rast before cap rast was available and her level for peanut was 1800. It was a class 4. So the scale was much bigger.

[This message has been edited by Carefulmom (edited November 17, 2005).]

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By Carefulmom on Fri, 11-18-05, 03:43

Okay, just found her modified rast from way back when. The units on this are IU/ml. Since there are 1000 mls to a liter, that would explain part of why these numbers are all so high. Here you go:
<750 is class 0 or negative
750 - 1650 is class 1
1650 - 3600 is class 2
3600 - 8000 is class 3
8000 - 18000 is class 4
18000 - 40000 is class 5
>40000 is class 6

They also have a scale for ASM% (whatever that is)
<70 is class 0
70 - 110 is class 1
110 - 220 is class 2
220 - 600 is class 3
600 - 2000 is class 4
2000 - 6000 is class 5
>6000 is class 6
This was the test where my dd was 1804 which was class 4.

So, you cannot really interpret the numbers without knowing which test and what units they used. That is why I always ask for a copy of the lab report.

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By Lebovitz on Fri, 11-18-05, 03:46

I will pull out the paper work when I get home. It must be the "rast" and I remember it was a class 5 so I'll be better informed! Thx.

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By Lebovitz on Fri, 11-18-05, 03:48

THANKS CAREFUL MOM!!! It can be so difficult at times! posted by Carefulmom:
[b]Okay, just found her modified rast from way back when. The units on this are IU/ml. Since there are 1000 mls to a liter, that would explain part of why these numbers are all so high. Here you go:
<750 is class 0 or negative
750 - 1650 is class 1
1650 - 3600 is class 2
3600 - 8000 is class 3
8000 - 18000 is class 4
18000 - 40000 is class 5
>40000 is class 6

They also have a scale for ASM% (whatever that is)
<70 is class 0
70 - 110 is class 1
110 - 220 is class 2
220 - 600 is class 3
600 - 2000 is class 4
2000 - 6000 is class 5
>6000 is class 6
This was the test where my dd was 1804 which was class 4.

So, you cannot really interpret the numbers without knowing which test and what units they used. That is why I always ask for a copy of the lab report.[/b][/quote]

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By MommaBear on Fri, 11-18-05, 13:44

Quote:Originally posted by Carefulmom:
[b]
So, you cannot really interpret the numbers without knowing which test and what units they used. That is why I always ask for a copy of the lab report.[/b]

completely understand. the allergy testing my oldest cub recently had put him at a "Class 6" but 6,000 was the top end of the particular [b]scale[/b] the lab was using.

I suspect if we used another scale, he'd come out a "Class 6" there as well. [img]http://uumor.pair.com/nutalle2/peanutallergy/smile.gif[/img]

__________________

"Artificial intelligence is no match for natural stupidity."

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