TABLE 3.

VALUES ASSUMED FOR MODEL PARAMETERS IN BASE-CASE, WORST-CASE, AND BEST-CASE SCENARIOS

	Base-Case Scenario (%)	Worst-Case Scenario (%)	Best-Case Scenario (%)
Risk of selecting INH-R TB in asymptomatic HIV-infected adults with prevalent TB disease	14	50	10
Abnormal CXR rate in asymptomatic HIV-infected adults	11	20	5
Prevalent TB disease in asymptomatic HIV-infected adults with abnormal CXRs	14	30	10
Efficacy of IPT in HIV-infected adults (regardless of TST status)	37.5	33	42

Definition of abbreviations: CXR = chest X-ray; INH-R = isoniazid resistant; IPT = isoniazid preventive therapy; TB = tuberculosis; TST = tuberculin skin test.

All other parameters remained identical to the base-case values shown in Table 1.