In the SMART Study, researchers from more than 30 countries around the world randomly assigned 5,472 participants infected with HIV with a CD4+ cell count of more than 350 per cubic millimeter to the continuous use of antiretroviral therapy or to the episodic use of antiretroviral therapy. The participants?,720 in the episodic therapy group and 2,752 in the continuous therapy group—were followed for an average of 16 months. Episodic therapy involved only using antiretroviral therapy when the CD4+ count decreased to less than 250 per cubic millimeter and then stopping therapy when the CD4+ count increased to more than 350 per cubic millimeter. The primary end point was the development of an opportunistic disease or death from any cause. An important secondary end point was major cardiovascular, renal, or hepatic disease.
There were 120 participants in the episodic therapy group and 47 in the continuous therapy group who had an opportunistic disease or died from any cause. Analysis of study data showed that those on episodic therapy had more than twice the risk of developing these endpoints compared to those in the continuous therapy group. In addition, participants in the episodic group experienced significantly more cardiac, renal, and hepatic complications. Observes Dr. El Sadr, "The latter finding is surprising considering that cardiac complications have been associated in other studies with such events and liver and kidney complications have been linked to such treatment."
According to Dr. El-Sadr, "Our find
Source:Columbia University's Mailman School of Public Health