Type of study Number Excluded Included
LTBI 4 2 2
BCG vaccination 3 - 3
TB control 2 - 2
Extrapulmonary TB 2 - 2
Tuberculosis screening 4 - 4
Cost of TB in developed countries 2 1 1
Cost of TB in developing countries 3 1 2
Total 20 4 16
Table 2: Type of the cost studies.