< 2 yrs  : Age - depenendent, no fixed referance range 
2- 18 yrs : Age and height - depenendent but generally > 90 considered normal and < 90 should be clinically evaluated.

Healtly young  Adult (18 - 40 years ): 90 - 120 
( After age 40 :eGFR normally declines with age by about 1 per year) 
Persistent eGFR <60 , generally inicated reduced GFR but should be age- adjusted and correlated with other markers of kidney damages.

< 2 yrs  : Age - depenendent, no fixed referance range 
2- 18 yrs : Age and height - depenendent but generally > 90 considered normal and < 90 should be clinically evaluated.

Healtly young  Adult (18 - 40 years ): 90 - 120 
( After age 40 :eGFR normally declines with age by about 1 per year). 
Persistent eGFR <60 , generally inicated reduced GFR but should be age- adjusted and correlated with other markers of kidney damages.