Normal values for GFR in men and women

Normal values for inulin clearance are shown for men (panel A) and women (panel B) of various ages, with the GFR measured as the urinary clearance of inulin. A GFR <60 mL/min/1.73 m² is the threshold for the definition of chronic kidney disease. Solid lines represent the mean value of GFR per decade of age, and dashed lines represent the value 1 SD from the mean value of GFR per decade of age.