Table 1.

Baseline demographic characteristics for participants in the NHANES III ages 50 y and above (n = 6,112)

MenWomen
With albuminuriaWithout albuminuriaP*With albuminuriaWithout albuminuriaP*
n7052,291N/A5922,524N/A
Percentage (SE) in category
Chronic kidney disease (yes)43.8 (3.42)28.7 (1.51)0.00459.5 (3.02)47.3 (1.32)0.002
Hypertension (yes)60.8 (2.82)42.6 (1.67)<0.00151.2 (3.02)40.7 (1.08)0.001
Diabetes (yes)15.8 (2.15)5.71 (0.60)<0.00124.2 (2.42)5.13 (0.57)<0.001
Current smoking (yes)33.3 (2.97)31.3 (1.69)0.5021.1 (2.90)18.8 (1.28)0.48
Race/ethnicity<0.001<0.001
Non-Hispanic white81.3 (1.93)89.2 (0.70)80.2 (1.85)87.9 (0.89)
Non-Hispanic black14.9 (1.79)7.64 (0.58)15.9 (1.72)9.20 (0.78)
Mexican Americans3.82 (0.41)3.12 (0.30)3.89 (0.41)2.91 (0.23)
Median (Interquartile range)
Age (y)67.2 (58.3-74.1)60.9 (54.8-68.3)<0.00166.8 (59.5-76.2)62.2 (55.2-70.5)<0.001
BMI (kg/m2)26.7 (24.3-30.0)26.8 (24.4-29.8)0.5927.7 (24.0-33.4)26.4 (23.2-30.6)0.001
Serum creatinine (mg/dL)1.18 (1.05-1.39)1.15 (1.04-1.26)<0.0010.97 (0.86-1.17)0.94 (0.84-1.05)<0.001
MDRD eGFR (mL/min/1.73 m2)59.9 (50.1-69.9)62.5 (56.1-69.2)<0.00154.8 (44.8-63.2)57.5 (50.3-64.7)<0.001
Systolic blood pressure (mm Hg)141 (130-156)131 (120-142)<0.001144 (130-161)130 (119-144)<0.001
Diastolic blood pressure (mm Hg)78.7 (71.4-86.2)76.6 (70.4-83.0)0.0275.2 (69.3-82.6)73.3 (67.8-79.1)0.01

NOTE: Except for sample size, all of the reported values were adjusted for sampling weight.

  • *The P values for demographic comparisons between individuals with and without albuminuria were calculated with log-transformed data for continuous variables (t test) and χ2 test for categorical variables.