Table 1.

Characteristics of the patient populationab

Populationn (%)Incident n (%)cPrevalent n (%)
a Continuous variables presented as mean ± SD. Numbers may not add up to total n because of missing data. BMI, body mass index; URR, urea reduction ratio.
b For the subset of patients with serum albumin measured by the bromocresol green laboratory method.
c Incident patients defined as those reported as initiating HD between January 1, 1999, and August 31, 1999.
d Diabetes mellitus as the primary cause of ESRD.
e Including bovine grafts.
f Hi-flux defined as KUf ≥ 20.
gP ≤ 0.05.
hP ≤ 0.001.
i Multiply by 10 to convert to g/L (SI).
j Multiply by 10 to convert to g/L (SI).
k Not significant.
Total81541399 (17)6755 (83)
Demographics
    gender
        male4336 (53)757 (54)3579 (53)k
        female3806 (47)641 (46)3165 (47)k
    race
        white4444 (55)846 (60)3598 (53)h
        black2958 (36)427 (31)2531 (37)
        other752 (9)126 (9)626 (9)
    age (yr)61 ± 1561.8 ± 15.960.6 ± 15.4g
    diabetes mellitusd3258 (40)636 (46)2622 (39)h
    postdialysis weight (kg)73.8 ± 19.573.8 ± 18.573.8 ± 20k
    BMI (kg/m2)26.2 ± 6.426.2 ± 6.126.3 ± 6.4k
    duration of dialysis3.5 ± 3.50.7 ± 0.23.9 ± 4.0h
Process measures and intermediate outcomes
    endogenous fistula2235 (28)389 (29)1846 (28)h
    prosthetic grafte3911 (49)562 (41)3349 (50)h
    percutaneous catheter1867 (23)410 (30)1457 (22)h
    hi-flux dialyzerf4306 (61)725 (60)3581 (62)k
    dialysis time (min)214.5 ± 30.4212.5 ± 27.8214.86 ± 31g
    blood pump speed (ml/min)388.5 ± 72.4370.4 ± 72.9392.2 ± 71.7h
    mean Kt/V1.47 ± 0.311.42 ± 0.321.49 ± 0.3h
    URR (%)70 ± 769 ± 870 ± 7h
Laboratory measures
    serum albumin (g/dl)bi3.7 ± 1.53.7 ± 0.43.8 ± 0.4h
    hemoglobin (g/dl)j11.4 ± 1.311.6 ± 1.311.4 ± 1.3h