TF and pulmonary tuberculosis: At admission, serum ferritin levels were 95.2 ± 38.7 ng/mL, serum iron was 42.6 ± 15.3 μg/dL, and transferrin saturation was 13.9 ± 5.2% in the pulmonary TB group, significantly lower than in the control group (75.3 ± 28.1 ng/mL, 55.0 ± 14.2 μg/dL, and 17.5 ± 4.7%, respectively; all p < 0.0001).