Table 5.

Hospitalization model: iron and comorbidity estimates

VariableUnadjustedAdjusted
RR (95% CI)PRR (95% CI)P
Iron
    none1.0 (reference)1.0 (reference)
    low (1 to 1000 mg)1.01 (0.90 to 1.14)0.8330.92 (0.83 to 1.03)0.149
    high (>1000 mg)1.25 (1.11 to 1.41)0.00021.12 (1.01 to 1.25)0.029
Race
    Asian0.64 (0.49 to 0.84)
    African American0.83 (0.75 to 0.91)
    Native American0.48 (0.33 to 0.68)
    White1.0 (reference)0.0001
Age (yr)
    18 to 300.43 (0.27 to 0.68)
    30 to 400.48 (0.37 to 0.61)
    40 to 500.63 (0.52 to 0.77)
    50 to 600.63 (0.53 to 0.74)
    60 to 700.72 (0.63 to 0.83)
    70 to 800.81 (0.70 to 0.92)
    ≥80+1.0 (reference)<0.0001
Gender
    female0.91 (0.83 to 1.00)
    male1.0 (reference)0.0398
Bicarbonate
    ≤181.24 (1.09 to 1.41)
    >18 and <211.08 (0.95 to 1.22)
    >21 and <241.04 (0.91 to 1.18)
    ≥241.0 (reference)0.0029
Albumin
    ≤32.17 (1.12 to 4.22)
    >3 and <3.52.47 (1.36 to 4.47)
    >3.5 and <42.15 (1.19 to 3.87)
    >4 and <4.51.70 (0.95 to 3.05)
    ≥4.51.0 (reference)<0.0001
Creatinine
    ≤51.42 (1.04 to 1.92)
    >5 and <7.51.66 (1.33 to 2.08)
    >7.5 and <101.59 (1.29 to 1.96)
    >10 and <12.51.56 (1.27 to 1.93)
    >12.5 and <151.57 (1.27 to 1.93)
    ≥151.0 (reference)0.0002
Hemoglobin
    ≤71.09 (0.78 to 1.54)
    >7 and <81.32 (1.06 to 1.66)
    >8 and <91.21 (1.00 to 1.46)
    >9 and <101.12 (0.94 to 1.33)
    >10 and <111.10 (0.93 to 1.31)
    >11 and <120.96 (0.79 to 1.15)
    ≥121.0 (reference)0.0187
BMI
    ≤201.14 (0.98 to 1.31)
    >20 and <241.71 (1.04 to 1.32)
    >24 and <281.10 (0.97 to 1.24)
    ≥281.0 (reference)0.0861