Table 4.

Poisson regression: Risk for hospitalization, Hb <11 versus ≥11 g/dla

CovariatesIRR, Crude(95% CI)IRR, Adjusted(95% CI)
Hb ≥ 11 g/dl (versus Hb < 11 g/dl)0.74 (0.56 to 0.96)b0.87 (0.66 to 1.15)
Age (yr)1.01 (0.93 to 1.09)1.01 (0.94 to 1.10)
White race0.89 (0.68 to 1.16)0.90 (0.68 to 1.19)
Male gender0.93 (0.71 to 1.21)0.97 (0.73 to 1.29)
Congenital/urologic cause of ESRD1.03 (0.79 to 1.36)0.98 (0.73 to 1.32)
HD initiation ≥ 180 d1.11 (0.84 to 1.47)1.24 (0.92 to 1.68)
HD access type: catheter1.17 (0.92 to 1.48)1.13 (0.87 to 1.45)
Medicare/Medicaid coverage1.13 (0.94 to 1.35)1.24 (0.96 to 1.60)
Serum albumin ≥ 3.5/3.2 g/dl (BCG/BCP)0.65 (0.46 to 0.92)b0.78 (0.54 to 1.12)
Serum ferritin ≥ 800 ng/ml1.21 (1.00 to 1.47)b1.21 (0.98 to 1.49)
Presence of HTN0.95 (0.81 to 1.12)0.87 (0.71 to 1.08)
eGFR by Schwartz (ml/min per 1.73 m2)1.00 (0.98 to 1.02)1.00 (0.98 to 1.03)
Iron use (yes)1.17 (0.86 to 1.60)1.19 (0.84 to 1.69)
Epoetin (units/kg per wk)
    151 to 2501.64 (1.08 to 2.48)b1.68 (1.11 to 2.54)b
    251 to 4001.27 (0.82 to 1.99)1.29 (0.83 to 2.00)
    >4002.07 (1.38 to 3.13)b1.89 (1.23 to 2.89)b
  • a IRR, incidence rate ratio.

  • b P < 0.05.