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Crohn's Disease Forum » Tests for IBD » Reference Ranges


09-09-2014, 01:12 AM   #1
AmyIsHere
 
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Join Date: Jul 2014
Location: Blue Springs, Missouri

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Reference Ranges

Can someone explain to me why reference ranges vary so much from one lab to another when the same units of measurement are used? It is making it very difficult for me to make comparisons among my results, as different labs were used and the labs have different ranges.

Example:
Lab one
Hematocrit: 34.2
Range: 34.0-46.6
Result: Normal

Lab two
Hematocrit: 36.1
Range: 37.0-47.0
Result: Low

Seemingly, my hematocrit number has gone up, however I've gone from normal to low. This is just one example of a discrepancy.

I'm sure there is an obvious reason. Any insight is appreciated. Thanks!
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Resection - June 10, 2014
Crohn's diagnosis - October 21, 2014

Pentasa: 4 grams/day (since 10/23/14)
Iron: 10 grams/day
B-12 injection: monthly
09-09-2014, 05:50 AM   #2
Catherine
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This is one of reason I try to use the same lab.

If the hemoglobin level has also gone up I would consider the second lab results as an improvement.
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Catherine
Mother of Sarah dx aged 16, Jan 2012
DX - CD 1/12, asthma
Small bowel to small bowel fistula

Meds: ), azathioprine 200mg, Mesalazine 1.2g x 2, seretide 250 x 2 (asthma), ventolin (as needed)

Currently no supplements.

Has previously taken Multi B, Caltrate, B12 & Iron

Prednisolone (from 30 mg 01/02/2012 to 17/06/2012, 30mg 24/10/12-28/12/12, 50mg 24/1/13-27/4/13)
09-09-2014, 10:57 AM   #3
AmyIsHere
 
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My hemoglobin is up from last time, but listed as low each time according to each lab's respective range.

Additionally, my CRP is higher, but the reference range is a lot higher. (Still "high" for either range.) It's just difficult. I usually try to go to my GP's office for any bloodwork, but it's when I have procedures at the hospital and they double up by doing my bloodwork same day.
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