Table 1.

Baseline characteristics of the study population (n = 14,829)

Characteristic% of Study Population
Age (yr)
    <4519.2
    45 to 6436.5
    ≥6544.3
Gender
    male51.9
    female48.1
Race
    white50.9
    black39.0
    other10.1
Former or current smoker32.3
Cause of ESRD
    diabetes32.5
    hypertension30.0
    glomerulonephritis13.7
    other23.8
Duration of ESRD (yr)
    <1.030.5
    1.0 to 4.949.5
    5.0 to 9.913.7
    ≥10.06.3
Previous renal transplantation7.1
Body mass index (kg/m2)
    <18.55.8
    18.5 to 24.943.7
    25.0 to 29.923.9
    ≥30.016.7
    missing9.9
Kt/V
    <1.018.7
    1.0 to 1.123.1
    1.2 to 1.319.2
    ≥1.415.1
    missing23.9
Albumin (g/dl)
    ≤3.420.1
    3.5 to 3.721.9
    3.8 to 3.918.4
    4.0 to 4.114.4
    >4.114.7
    missing10.5
Hemoglobin (g/dl)
    ≤8.819.3
    8.9 to 9.719.3
    9.8 to 10.418.0
    10.5 to 11.217.5
    >11.217.5
    missing8.4
Calcium (mg/dl)
    ≤8.718.5
    8.8 to 9.218.1
    9.3 to 9.618.1
    9.7 to 10.218.1
    >10.217.8
    missing9.4
Phosphorus (mg/dl)
    ≤4.419.7
    4.5 to 5.317.2
    5.4 to 6.318.7
    6.4 to 7.516.9
    >7.518.0
    missing9.5
Calcium × phosphorus product (mg2/dl2)
    ≤40.918.0
    41.0–50.118.0
    50.2–59.218.0
    59.3–71.018.0
    > 71.018.0
    missing10.0
Parathyroid hormone (pg/dl)
    ≤3713.1
    38 to 9912.7
    100 to 21012.7
    211 to 48012.8
    >48012.8
    missing35.9
Comorbid conditions
    diabetes mellitus40.7
    coronary artery diseasea36.7
    congestive heart failure39.7
    stroke or transient ischemic attack16.3
    peripheral vascular disease24.5
    malignancy9.4
    chronic lung disease12.5
  • a History of coronary artery disease included one of the following: Angina, coronary artery disease, abnormal angiogram, angioplasty, coronary artery bypass grafting, and myocardial infarction.