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I've ben tracking my son's IgG for Mycoplasma for over a year. Recently he's been off all antibiotics - for several months - and we tested again. Unfortunately we had to use a different lab than usual. And the results are in a different format. Does anyone know if I can compare them to each other? I'm thinking theoretically I may be able to take the high for each lab and do a ratio - but I'm not 100% sure - because they may be using entirely different methods of testing. LabCorp (his usual lab) Myco P IgG in March result 2405 (indeterminate is 100-320) Quest Test in May result said ">5" with indeterminate range of (.91-1.09) Had to have doctor call to get actual number. You would think that >5 would mean the actual number would be 5.somehting - LOL. It was 11.23 If I use the ratio with the "High Range" number from both tests, then the Quest equivalent for his March Lab Corp number of 2405 would be 8.19...meaning it went WAY up, to 11.23 I was hoping I could just multiply the Quest number by 100 to get equivalent LabCorp number - since Quest has a median of "1" in the indeterminate range. and negative for Lab corp is less than 100... I like that answer a lot better - that would mean his number is 1123 (down from 2405)..It seems like this is probably incorrect, but its the answer I want! The median is actually 210, so it should be 210 times 11.23 = 2358....which is at least close to his old number and seems to make the most sense. Does anyone know if these labs are even using the same test (ELISA? or whatever?) and if there is a conversion I can use? I can't even google it since I don't know the names for these different formats of reporting, or if they are using entirely different testing methods. THANK YOU!!
