Results for studies on preventive therapy in HIV-infected individuals and in household contacts.

aFor example, comparing patients with positive versus negative tuberculin skin tests.bIncluding studies that addressed effects on treatment outcomes.cStudies testing a hypothesis about measures to improve treatment completion or adherence.dAs specific study objective, no hypothesis testing about measures to improve treatment completion or adherence.eTwo multi-country studies situated at locations with different TB incidences and HIV prevalence; one of these in various regions.fNumber of studies evaluating effects on health outcomes.HAART, highly active antiretroviral treatment.