Table 4.

Survival model: iron and comorbidity estimatesa

VariableUnadjustedAdjusted
RR (95% CI)PRR (95% CI)P
Iron
    none1.0 (reference)1.00 (reference)
    low1.00 (0.91 to 1.11)0.9220.93 (0.84 to 1.02)0.141
    high1.18 (1.07 to 1.30)0.0011.11 (1.00 to 1.24)0.05
Race
    Native American0.50 (0.34 to 0.75)
    Asian0.80 (0.63 to 1.01)
    Black0.77 (0.71 to 0.85)
    White1.0 (reference)0.000
Age (yr)
    18 to 301.0 (reference)<0.001
    30 to 401.50 (0.97 to 2.33)
    40 to 501.97 (1.30 to 3.00)
    50 to 602.28 (1.53 to 3.41)
    60 to 702.91 (1.95 to 4.34)
    70 to 803.93 (2.63 to 5.86)
    ≥806.35 (4.21 to 9.57)
Gender
    female0.81 (0.74 to 0.88)
    male1.0 (reference)<0.001
Bicarbonate
    ≤181.0 (reference)0.0402
    >18 and <210.92 (0.83 to 1.02)
    >21 and <240.85 (0.77 to 0.95)
    ≥240.92 (0.82 to 1.04)
Albumin
    ≤31.56 (0.85 to 2.87)<0.001
    >3 and <3.51.77 (1.02 to 3.10)
    >3.5 and <41.49 (0.86 to 2.58)
    >4 and <4.51.20 (0.70 to 2.08)
    ≥4.51.0 (reference)
Creatinine
    ≤51.0 (reference)<0.001
    >5 and <7.51.08 (0.87 to 1.34)
    >7.5 and <101.03 (0.84 to 1.27)
    >10 and <12.50.98 (0.78 to 1.23)
    >12.5 and <150.81 (0.64 to 1.03)
    ≥150.60 (0.45 to 0.79)
Phosphorus
    ≤51.0 (reference)<0.001
    >5 and <71.11 (1.01 to 1.22)
    ≥71.15 (1.03 to 1.22)
Hemoglobin
    ≤71.17 (0.86 to 1.60)
    >7 and <81.35 (1.09 to 1.67)
    >8 and <91.18 (0.99 to 1.41)
    >9 and <101.02 (0.86 to 1.22)
    >10 and <111.01 (0.86 to 1.19)
    >11 and <120.84 (0.71 to 1.00)
    ≥121.0 (reference)<0.001