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Measured values for GFR are shown for men and women of various ages, with the GFR measured as the urinary clearance of inulin in Pakistani adults and compared to GFR in US adults also measured as inulin clearance reported by Wesson et al (13). Black lines are for Pakistani adults and gray lines for US. Solid lines represent the mean value of GFR per 5 year age group, and dotted black lines represent corresponding 1 SD from the mean value of GFR.
