C3 and infection: Regarding the laboratory test results, the hemoglobin (11.1 ± 2.2/μL vs. 11.8 ± 1.7/μL, p = 0.001) and C3 (78.2 ± 40.2 mg/dL vs. 87.4 ± 39.5 mg/dL, p = 0.043) levels were lower in the infection group than in the control group.