Selected model parameter values and ranges.

All costs are given in 2011 US dollars.aAs smear status is tracked in the model, the sensitivity of sputum smear for individuals classed as smear-negative and smear-positive is 0% and 100% (respectively) by construction.bAs sputum culture is the gold standard for TB detection, the sensitivity is assumed to be 100%.cAs the per-test cost of Xpert is of key interest to policy-makers (and potentially subject to price negotiation), the results of the analyses are presented for three separate values for the Xpert cost.