Summary of selected treatment parameter values.

3TC  =  lamivudine; ART  =  antiretroviral therapy; AZT  =  zidovudine; ddI  =  didanosine; d4T  =  stavudine; EFV  =  efavirenz; ENF  =  enfuvirtide; FTC  =  emtricitabine; HAART  =  highly active antiretroviral therapy; IDV  =  indinavir; LPV/r  =  lopinavir/ritonavir; NRTI  =  nucleoside reverse transcriptase inhibitors; NNRTI  =  non-nucleoside reverse transcriptase inhibitors; OBR  =  optimized background antiretroviral regimen; SD  =  standard deviation; TDF  =  tenofovir.
*Note that treatment efficacy was capped at a maximum of 95% and a minimum of 5% regardless of regimen; in some instances this resulted in a percent change in efficacy that was less than the original stated change.
†The ART effect is defined as an independent protective effect of HAART and is modeled as a multiplier which decreases the incidence of opportunistic infections and AIDS-related mortality in patients with virologic failure who remain on HAART.