Key cost components extracted from studies included in review (Adjusted to 2011 USD).^*

*List is not a comprehensive list of all costs included in studies, but is restricted to those costs included in common decision model described in main text. N/A = Cost not included in study. Full LTBI tx cost = includes cost for complete regimen cited in publication. Active TB Cost = cost for a passively diagnosed Active case. IGRA test cost = All studies considered Quantiferon, except Reference (12) (T-Spot only), Reference (16) (generic IGRA) and Reference (20) (included both QFN and T-spot). **Cost is for drugs and incentives only. Administrative and delivery expenses associated with LTBI treatment are included in the fixed program costs of 150 US$ (2007) per year per study participant. These additional costs are not accounted for in any of the costs categories listed above. †Cost shown for mild hepatitis.