Advances in antiretroviral therapy (ART) have dramatically reduced mortality and morbidity rates for HIV infected people. However, HIV infection is a costly disease to treat. With improvement in survival, quality of life and the long-term cost of HIV treatment have become increasingly important to the majority of individuals infected with HIV. Different HIV treatment regimens may lead to variations in quality of life and health care costs over the course of treatment. In the SMART study, participants were randomly assigned to one of two treatment groups: