In patients with the concurrent OIs, baseline eGFR < 60ml/min/1.73m2, baseline BMI < 18.5 kg/m2, baseline CD4+ T cell count < 200 cells/μL or age ≥ 50 years, the proportion of total anemia was 61.4%, 58.2%, 50.6%, 47.8% and 41.6%, respectively. Here, CD4 is linked to anemia.