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.