Table 3.

Patient characteristics for patients undergoing MHD on day 90 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 = 550,435)110,402132,118147,436160,479
Age (yr)61.8 ± 15.162.1 ± 15.162.4 ± 15.262.9 ± 15.2
Gender (% male)53.553.653.554.2
Race (%)
    white61.462.063.062.8
    black32.631.930.630.6
    Asian3.33.53.63.6
    other2.72.62.83.0
Hispanic ethnicity (%)11.711.813.313.4
Employment status (%)
    unemployed19.217.617.517.2
    employed17.017.217.116.2
    homemaker6.76.15.95.3
    retired56.258.358.660.5
    other/unspecified0.90.80.90.9
Primary cause of ESRD (%)
    diabetes45.446.046.746.3
    hypertension24.324.324.625.7
    other30.329.728.728.0
Selected coexisting conditions or risk factors (%)
    congestive heart failure34.232.632.331.9
    ischemic heart disease23.724.024.925.2
    myocardial infarction8.98.88.88.5
    tobacco use (current smoker)5.75.15.15.2
    inability to ambulate4.33.73.74.0
    inability to transfer1.51.21.31.3
Weight (kg)70.5 ± 20.172.6 ± 20.376.2 ± 19.977.4 ± 20.3
BMI (kg/m2)25.7 ± 6.526.4 ± 6.827.2 ± 6.827.6 ± 7.0
Predialysis erythropoietin use (%)22.825.929.231.6
Hemoglobin (g/dl)9.4 ± 1.79.6 ± 1.79.8 ± 1.79.9 ± 1.7
Serum albumin (g/dl)3.2 ± 0.63.1 ± 0.73.1 ± 0.73.1 ± 0.7
Serum creatinine (mg/dl)8.4 ± 3.87.9 ± 3.87.5 ± 3.77.2 ± 3.6
GFR7.9 ± 4.08.6 ± 4.69.3 ± 5.19.9 ± 5.4