Evaluation of serum tuberculosis antibody in diagnosis of tuberculosis

Objective To evaluate the value of tuberculosis antibody test(colloidal gold method) in the diagnosis tuberculosis.Methods 85 cases of pulmonary tuberculosis and 59 cases of other diseases were selected,all patients were detected serum tuberculosis antibody.Results The total positive rate of serum tuberculosis antibody in the tuberculosis group was 56.5%,while the positive rate of the pneumonia group was 0% and which of the lung cancer group was 24.4%,showing statistical difference by χ2 test(P0.05).The sensitivity was 56.4%,the specificity was 83.0% and the Youden index was 39.4%,the area under ROC curve was 0.710.Conclusion Serum tuberculosis antibody detection has certain clinical value for the diagnosis and differential diagnosis of tuberculosis.