"Everything I can find says normal levels are 60 and above, not 90 like the DR. sheet shows."
That in my opinion is a complete waste of time. What you google and what is on the Dr. sheet have no reason to be the same test with the same range of normal. Not sure how you arrived at that conclusion. If you take the numbers out of their context they lose meaning. Rather than the numbers I look for rate of change in the numbers. It is like flying an assigned altitude, being off a few hundred feet is bad but if the associated rate of change or vertical speed is large your going to be in trouble quickly.
Lets examine mine from December I do these all the time thru directlabs.com.
TESTS RESULT FLAG UNITS REFERENCE INTERVAL
Glucose, Serum 82 mg/dL 65-99
Uric Acid, Serum 5.0 mg/dL 3.7-8.6
Therapeutic target for gout patients: <6.0
BUN 19 mg/dL 6-24
Creatinine, Serum 1.40
HIGH mg/dL 0.76-1.27
eGFR If NonAfricn Am 59
LOW mL/min/1.73 >59
eGFR If Africn Am 68 mL/min/1.73 >59
BUN/Creatinine Ratio 14 9-20
Everything here is relative *ONLY* to the "REFERENCE INTERVAL" listed by the lab conducting the analysis - period.
My Creatinine is always high, is listed as high on my 10-year spreadsheet. It has been higher, knowing my 10 year history prevents me from worrying because now I am comparing it to my running average and that is meaningful ( i.e. it is not changing significantly to the worse - rate of change is insignificant ).
eGFR is an estimated GFR and the calculation is driven by the Creatinine and BUN.
An eGFR test
may not be as useful for those who differ from normal creatinine concentrations. This may include people who have significantly more muscle (
such as a body builder) or less muscle (such as a muscle-wasting disease) than the norm, those who are extremely obese, malnourished, follow a strict vegetarian diet, ingest little protein, or who take creatine dietary supplements. Likewise, the eGFR equations are not valid for those who are 75 year of age or older because muscle mass normally decreases with age.
Look how many different ways eGFR can be calculated, it usually involves dividing by creatinine.
en.wikipedia.org/wiki/Renal_function Again more relativity to now the formula using numbers relative to the labs range.
I bodybuild and have little fat so these numbers always look bad but are static which means I am fine.
I understand your not estimating but using actual GFR. My point was to illustrate how crazy this can get out of hand.
The question for you is what is your normal/baseline and is it changing and if it is changing is it changing rapidly ? You need the same lab with repeated testing to know and keep it simple. Post Edited (aguywithuc) : 2/5/2013 12:19:05 AM (GMT-7)