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Cubic spline models of the Cox proportional regression analyses reflecting adjusted mortality-predictability (with 95% CI) according to predialysis serum albumin in African-American (upper panel) vs. White (Hispanic and non-Hispanic, lower panel) MHD patients over 6 years. Spline models are with 2 degrees of freedom. Case-mix includes age, gender, diabetes mellitus, Charlson comorbidity index score and dialysis vintage.
