Following data were retrieved from each eligible study by two independent reviewers: first author name, year of publication, sample type (prospective or retrospective), number of patients of TBM and non-TBM, ethnicity of patient (divided into Asian and Caucasian), country of origin, ADA measurement assay method, reference standard (bacteriology with culture/PCR and radio imaging), cut-off value of CSF-ADA, etiology of control group (bacterial, viral, etc.), AUC. Here, ADA is linked to meningeal tuberculosis.