However, anemia with excess OH remained an independent predictor of the adverse outcomes.
Patients with anemia with excess OH had a significantly increased risk of the cardiovascular and renal outcomes relative to those with no anemia.
Moreover, the HR was also statistically different for patients with anemia with excess OH (reference group) from those with true anemia (adjusted HR for cardiovascular outcome, 0.31; 95% CI, 0.12 to 0.82; P=0.018, and adjusted HR for renal outcome, 0.42; 95% CI, 0.23 to 0.74; P=0.003, respectively).
We also performed multivariate Cox analyses with hemoglobin as a continuous variable.
The predictive power of hemoglobin for cardiovascular and renal risks attenuated after adjustment for OH (Table 4)