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Kidney function can be estimated using different types of values ̢���?̢���?for eGFR, which are different calculated measures of kidney function. Using the values ̢���?̢���?for Creatinine and Cystatin C , three different eGFR values ̢���?̢���?can be calculated: one based on Creatinine, one on Cystatin C and an average value of these two. Of these three values, the mean value is the measurement method that gives the best results regarding assessment of kidney function, which is called eGFR (mean). It is good to fill in your current height and weight in your health profile in the medical record, which can sometimes be needed for calculating absolute eGFR values. GFR, which stands for Glomerular Filtration Rate, is a measure of kidney function. The value shows the kidneys' ability to filter the blood, and you then get an idea of ̢���?̢���?how well the kidneys' ability to clean the blood works. eGFR (Cyst C) is an estimated value of kidney function calculated based on your value of cystatin C as well as your age and gender. The higher the cystatin C, the lower the eGFR and the worse the kidney function.
eGFR is calculated in order to be able to assess a person's kidney function and early detect kidney function impairment which usually has not had time to give rise to any noticeable symptoms.
Untreated hypothyroidism (underfunction of the thyroid gland) can give a low cystatin C value and thus a falsely elevated eGFR (Cystatin C). Cortisone treatment and untreated hyperthyroidism (overfunction of the thyroid gland) can give elevated cystatin C and thus falsely too low calculated eGFR.
