Table 3. Prevalence of renal impairment according to age and gendera

GFR <60 mL/min 1.73 per m2bGFR 30 to 59 ml/min 1.73 per m2GFR <30 ml/min 1.73 per m2
a Data are percent prevalence (95% confidence interval).
b GFR defined as glomerular filtration rate calculated by the Cockcroft-Gault method and corrected for body surface area, ml/min 1.73 per m2.
All men9.3 (7.3, 11.4)9.1 (7.0, 11.1)0.3 (0.1, 0.4)
    25 to 44 yr
    45 to 64 yr1.8 (1.0, 2.6)1.8 (1.0, 2.6)0.0 (0.0, 0.0)
    ≥65 yr51.8 (47.1, 56.5)50.3 (45.6, 55.0)1.5 (0.6, 2.3)
All women13.0 (9.6, 16.4)12.6 (9.4, 15.8)0.4 (0.1, 0.7)
    25 to 44 yr0.0 (0.0, 1.0)0.0 (0.0, 1.0)
    45 to 64 yr3.2 (1.9, 4.4)3.2 (1.9, 4.4)
    ≥65 yr57.2 (51.4, 63.0)55.3 (49.2, 61.4)1.9 (0.7, 0.5)
All subjects11.2 (8.6, 13.8)10.9 (8.4, 13.3)0.3 (0.2, 0.5)
    25 to 44 yr0.0 (0.0, 0.0)0.0 (0.0, 0.0)
    45 to 64 yr2.5 (1.6, 3.3)2.5 (1.6, 3.3)0.0 (0.0, 0.0)
    ≥65 yr54.8 (50.2, 60.0)53.1 (48.7, 57.5)1.7 (1.1, 2.4)