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Study Reveals Benefits of Early HIV Treatment

by VR Sreeraman on July 29, 2012 at 4:45 PM
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 Study Reveals Benefits of Early HIV Treatment

Results of a new study shows the additional benefits of providing early antiretroviral treatment to HIV-infected individuals. Starting treatment early when their immune systems are healthier delays AIDS-related health events like chronic herpes simplex virus and tuberculosis, as well as death.

Additionally, researchers found that earlier HIV treatment is also cost-effective because it increases survival, prevents costly opportunistic infections and averts transmission of the virus to uninfected individuals.

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The new study was conducted by further analyses of the landmark NIH-funded treatment-as-prevention study (HPTN 052).

Initial results from the HPTN 052 study, which was announced in 2011, demonstrated that earlier use of antiretrovirals by HIV-infected heterosexuals partnered with uninfected individuals (serodiscordant couples) reduced HIV transmission by 96 percent.
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In two years of follow-up analysis of 1,761 HIV-infected study participants, researchers compared those who delayed antiretroviral treatment until their CD4+ T-cell counts were an average of 230 cells/ per cubic millimeter with those who began antiretroviral treatment sooner.

The delayed group experienced a shorter time to a primary clinical event, including AIDS-defining disease and all types of tuberculosis. In total, there were 91 primary clinical events in the delayed treatment group versus 71 in the immediate group.

This included 71 cases of AIDS-defining disease in the delayed treatment group versus 49 in the immediate group, and 34 cases of tuberculosis in the delayed group versus 17 in the immediate group.

The trial provides evidence that earlier antiretroviral treatment among the HIV-infected provides significant health benefits.

In a separate modelling analysis designed to predict the clinical impact, costs and cost-effectiveness of the earlier antiretroviral treatment strategy, researchers compared the delayed treatment versus earlier treatment data in South Africa and India.

The two countries were selected to show how regional economic differences may or may not affect the conclusions. The researchers designated earlier treatment to be "very cost effective" if its cost-effectiveness ratio was less than one times per capita gross domestic product (GDP).

Earlier treatment was deemed "cost effective" if its cost-effectiveness ratio was less than three times per capita GDP. The GDP was set at 8,100 dollars for South Africa and 1,400 dollars for India.

Using this model, they found that in both South Africa and India early ART increases patient survival, prevents costly opportunistic infections-partially offsetting the costs of treatment-averts HIV transmission, and is cost-effective within a five-year span and very cost-effective over a lifetime.

The findings of the two analyses were presented at the XIX International AIDS Conference (AIDS 2012) in Washington, D.C.

Source: ANI
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