Table 1.

Characteristics of incident patients with ESRD in the four study periods

CharacteristicP1 (1996 to 1997)P2 (1998 to 1999)P3 (2000 to 2001)P4 (2002 to 2003)
No. of patients (N = 670,875)138,986161,577178,772191,540
Age (yr)61.7 ± 15.262.3 ± 15.362.7 ± 15.363.2 ± 15.3
Gender (% male)53.853.853.554.2
Race (%)
    white64.164.365.064.6
    black30.029.728.829.0
    Asian3.23.43.53.6
    other2.72.62.72.8
Hispanic ethnicity (%)11.211.412.812.9
Employment status (%)
    unemployed18.116.716.716.4
    employed18.017.817.716.7
    homemaker6.76.15.85.3
    retired56.358.558.960.8
    other/unspecified0.90.90.90.9
Primary cause of ESRD (%)
    diabetes45.045.546.045.5
    hypertension23.523.924.325.5
    other31.530.629.729.0
Selected coexisting conditions or risk factors (%)
    congestive heart failure34.232.932.632.1
    ischemic heart disease24.324.525.325.6
    myocardial infarction9.39.19.28.7
    tobacco use (current smoker)5.75.15.05.1
    inability to ambulate4.54.04.04.3
    inability to transfer1.61.41.51.5
Weight (kg)69.9 ± 20.072.1 ± 20.275.9 ± 19.877.1 ± 20.1
BMI (kg/m2)25.5 ± 6.526.2 ± 6.727.1 ± 6.827.5 ± 6.9
Predialysis erythropoietin use (%)23.926.930.132.4
Hemoglobin (g/dl)9.4 ± 1.89.6 ± 1.79.8 ± 1.810.0 ± 1.7
Serum albumin (g/dl)3.2 ± 0.73.2 ± 0.73.1 ± 0.73.1 ± 0.7
Serum creatinine (mg/dl)8.3 ± 3.87.8 ± 3.77.3 ± 3.67.1 ± 3.6
GFR8.0 ± 4.28.8 ± 4.79.5 ± 5.210.0 ± 5.5
Status on day 90 (%)
    in-center hemodialysis79.481.882.583.8
    peritoneal dialysis10.98.47.87.1
    dead7.68.08.28.2
    transplant.70.60.60.4
    lost to follow-up/unknown1.41.20.90.5