Table 1.

Characteristics of the study population, according to baseline urinary protein and estimated GFR levelsa

Urinary Protein LevelEstimated GFRb
None/Trace30 to 299 mg/dl>300mg/dlPTrend<70ml/min70 to 89 ml/min≥90ml/minPTrend
a Values are mean/percentage ± SEM.
b Cutoffs represent the 5th and 20th percentiles of the GFR distributions.
No. of participants85281966249591068327
Age (yr)49 ± 0.352 ± 1.254 ± 2.7<0.00148 ± 0.355 ± 0.563 ± 0.9<0.001
Systolic BP (mmHg)129 ± 0.6140 ± 2.1152 ± 4.3<0.001128 ± 0.6131 ± 1.2143 ± 1.8<0.001
Diastolic BP (mmHg)80 ± 0.588 ± 1.688 ± 1.9<0.00180 ± 0.580 ± 0.985 ± 1.00.001
Total cholesterol level (mg/dl)223 ± 1.1231 ± 4.9242 ± 120.02221 ± 1.2230 ± 2.3239 ± 1.9<0.001
Body mass index (kg/m2)25.9 ± 0.726.8 ± 0.429.3 ± 1.60.00225.7 ± 0.126.1 ± 0.227.1 ± 0.3<0.001
Male gender (%)46.9 ± 0.554.2 ± 4.252.8 ± 8.10.0955.1 ± 0.950.9 ± 1.660.8 ± 2.60.99
Black (%)9.3 ± 1.125.2 ± 3.730.7 ± 8.8<0.0016.0 ± 1.35.7 ± 1.510.5 ± 1.3<0.001
Diabetes mellitus (%)4.9 ± 0.214.1 ± 0.335.4 ± 6.7<0.0014.5 ± 0.36.5 ± 0.88.5 ± 1.00.006
History of cardiovascular disease (%)6.0 ± 0.213.1 ± 3.115.8 ± 5.6<0.0014.5 ± 0.37.9 ± 1.012.9 ± 1.20.001
Current smoker (%)35.7 ± 0.743.8 ± 3.747.6 ± 9.1<0.00136.9 ± 0.830.9 ± 2.120.2 ± 2.80.006
Not physically active (%)38.9 ± 0.857.2 ± 5.651.0 ± 7.8<0.00139.2 ± 1.134.7 ± 1.846.7 ± 2.80.10
Completed high school (%)63.7 ± 1.144.6 ± 3.243.4 ± 7.5<0.00164.9 ± 1.460.5 ± 1.954.1 ± 2.60.12