I have posted on the board. What does mid range mean?
My Ft4 is 17pmol/l (10-20)
And Ft3 is 4.8 pmol/l (2.8-6.8)
Am I at mid range here? And if so why do I feel worse not better taking thyroxine? I am only meant to be borderline but am cold exhausted, hoarse, sore throat etc. sorry to bombard you but have been on this stuff for months and it hasn't helped, should I be looking at other causes?
Last edited by Administrator; 07-05-2012 at 08:38 AM.
Please realize that my comments about mid-range levels were geared to those seeking a diagnosis.
Please also know that it's not uncommon to feel worse during the meds titration process. This doesn't mean you don't need thyroxine.
People like you who are already being treated would be better off aiming for FreeT4 and FreeT3 levels similar to those that healthy people will have.
This usually means FreeT4 and FreeT3 levels around 60-80% of range (or even slightly higher if that's what it takes to eliminate symptoms).
The fact that you are still having symptoms tell us that your levels are too low for you.
60-80% of range based upon your lab's ranges means FreeT4 at least 16 and up to 18, if not higher....and FreeT3 5.2 up to 6.
Close enough isn't good enough. Each of us has his/her own "setpoints" which are a range of thyroid hormone levels within the ranges of normal that keep us feeling good.
For example, my setpoints are FreeT4 95-105% of range and FreeT3 75-90% of range.
It's clear to me that your doctor should increase your thyroxine dose. I was able to get a dose increase by pointing out to my doctor that my FreeT4/T3 levels had room to increase and still fall within the normal range. Maybe this will work for you.
Thank you for answering so quickly! I just thought being borderline I wouldn't have such dramatic symptoms and dread the thought of full blown! You have given me something to aim for, raising meds has never once been mentioned but at least the GP (not my normal one, had to see a different one as thought I had a throat infection but don't, its just sore again but in an even worse way) anyway he decided it should be dealt with by an endocrinologist as my results each time were all different even the female hormone panel ones. I hope the new tests I will get with the endo will spur her into upping and if not I know to suggest it and now..why thanks to your explanation...really helpful thank you!
To find the middle of a lab range, add together the high and low ends of the range and divide by 2. That's mid-range.
To find what percentage of a range your result is, here's the calculation. For demonstration purposes, I’m using a reference range for FT4 of 0.8 - 1.8 (ng/dL) and a test result of 1.23:
1. Subtract the bottom of the range from the top (1.8-0.8 = 1)
2. Subtract the bottom of the range from your value (1.23 - 0.8 = 0.43)
3. Divide #2 by #1 (0.43/1 = 0.43) and turn the 0.43 into a percentage = 43%
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The Following User Says Thank You to midwest1 For This Useful Post: Surfing4answers (07-05-2012)
Hi midwest1, thank you so much for the calculations, I have no doubt you have most likely done this many many times so your patience is very much appreciated! I am absolutely useless at maths but I am going to attempt to use your calculations to work out my figures on my own test results as I no doubt will be getting new ones when I see the endo. I am hoping the one my gp recommends is open to my own suggestions at I have gleaned from surfing these boards. It is a real wealth of information! Again, thank you!