Hello - thanks for asking your question.
GFR - or glomerular filtration rate - is a measure of kidney function. The normal level for females is 88-128. Your elevated creatinine along with the reduced GFR is indicative of some degree of kidney failure.
There are many causes for kidney failure and this should be evaluated by your physician. The first thing would be chronic NSAID use. Chronic use of NSAIDs is associated with kidney failure. I would discuss an alternative form of treatment for your spine and bone spur issues.
I would also obtain further urine tests including a urinalysis, urine volume and urine sodium excretion. Imaging tests such as an ultrasound or CT scan should also be considered.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.