Characteristics* associated with efficacy of initial antiretroviral therapy: February 2013 DHHS ‘Alternative’ regimens (39 groups).

*Dosing relative to food, third drug class, previous AIDS events and pre-treatment CD4 interacted significantly with DHHS regimen type to affect efficacy.†NRTI backbone and pre-treatment CD4 count were not significantly associated with efficacy on univariable analysis.DHHS, United States Department of Health and Human Services; SD, standard deviation; CI, confidence interval; TDF, tenofovir; FTC, emtricitabine; 3TC, lamivudine; ABC, abacavir; NRTI, nucleoside reverse transcriptase inhibitor; NNRTI, non-nucleoside reverse transcriptase inhibitor; PI, protease inhibitor; INSTI, integrase strand transfer inhibitor.