Figure 2From: Target prioritization and strategy selection for active case-finding of pulmonary tuberculosis: a tool to support country-level project planning Proportional yields. (a) Proportions of prevalent TB cases are denoted as PYss, PYsc, PYxs and PYxc by TB symptoms and smear statuses where the total sum is 100% (Table 1). (b) Proportional yields based on the TB prevalence survey in Viet Nam.7 (c) Based on the TB prevalence survey in Cambodia.4 (d) Calculated by assuming that 40% of prevalent TB cases can be identified through symptomatic screening, 60% of TB cases are smear- positive and they are independently distributed. Note their similarity with (b).Back to article page