Cost-Effectiveness of isoniazid preventive therapy among HIV-infected patients clinicaly screened for latent tuberculosis infection in Dar es Salaam, Tanzania: A prospective Cohort study

Table 5 Outcomes and costs of IPT (in US $) among HIV-infected patients in Dar-es Salaam

	All patients	IPT group	Controls
Number of enrolled patients in the two groups	2564	1283	1281
Number of patients Completing 6 months of IPT	1255	1255	N/A
Number of patients developed active TB during follow up	13	2	11
Number of deaths occurred during follow up	27	3	24
Estimated IPT effectiveness using incident TB^a	420	N/A	N/A
Estimated IPT effectiveness using all-cause mortality^b	979	N/A	N/A
Cost per person starting IPT^c US $	N/A	132.88	N/A
Cost per person to complete 6 months of IPT^d US $	N/A	135.85	N/A

TB Tuberculosis
N/A Not applicable
^aNumber of TB cases prevented per 100,000 population
^bNumber of all-cause mortality averted per 100,000 population
^cIncremental cost due to IPT divided by the number of patients enrolling in IPT
^dIncremental cost due to IPT divided by the number of patients completing 6 months of IPT

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