Kidney Gfr Normal Range For Age

Glomerular filtration rate gfr gfr or glomerular filtration rate shows how much blood your kidneys filter in 1 minute.

Kidney gfr normal range for age.

Gfr decreases progressively after the age of 40 years. The formula to calculate gfr includes body size age sex and ethnicity. The prevalence of ckd is estimated to be 46 8 percent in those older than 70 years 1. Gfr number by age the normal range of kidney glomerular filtration rate is 100 to 130 ml min 1 73m2 in men and 90 to 120ml min 1 73m2 in women below the age of 40.

Gfr is the best measure of kidney function but both creatinine and gfr can be useful indicators of your kidney health. Egfr declines with age even in people without kidney disease. A better way to measure kidney function is to estimate gfr with equations that use serum creatinine levels and some or all of the following variables. If gfr goes down it s a bad sign.

In adults the normal egfr number is more than 90. Gender age weight and race. If creatinine goes up it s a bad sign. In a recent study the use of a threshold value of 60 ml min 1 73 m 2 independent of age was also questioned.

Normal gfr varies according to age sex and body size. See chart below for average estimated egfr based on age. Patients with markers of kidney disease and an egfr 90 ml min 1 73m2 are classified as stage g1 and those with an egfr 60 90 ml min 1 73m2 as stage g2. Stage description glomerular filtration rate gfr 1 kidney damage e g protein in the urine with normal gfr 90 or above 2 kidney damage with mild decrease in gfr 60 to 89 3a moderate decrase in gfr 45 to 59 3b moderate decrease in gfr 30 to 44 4 severe reduction in gfr 15 to 29 5 kidney failure less than 15.

In the united states chronic kidney disease ckd defined by reduced gfr 60 ml min per 1 73 m 2 or presence of kidney damage is very common in the elderly population. Our data suggest that recommendations to define kidney disease must be changed. Importantly patients with an egfr 60 ml min 1 73m2 and no other markers of kidney disease should be considered as having normal renal function and not labelled as having ckd. Over 10 of prospective donors older than 60 years had a mgfr 60 ml min 1 73m 2 and our model suggests that the lower limit of the normal range for gfr drops to 60 ml min 1 73m 2 by the age of 50 and 55 years for females and males respectively meeting the gfr cut off in the current definition of chronic kidney disease ckd.