Characteristics* associated with efficacy of initial antiretroviral therapy: February 2013 DHHS ‘Preferred’ regimens (27 groups).

*Dosing relative to food, third drug class, previous AIDS events and pre-treatment CD4 interacted significantly with DHHS regimen type to affect efficacy.†Dosing relative to food, NRTI backbone, third drug class and previous AIDS events 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; NRTI, nucleoside reverse transcriptase inhibitor; NNRTI, non-nucleoside reverse transcriptase inhibitor; PI, protease inhibitor; INSTI, integrase strand transfer inhibitor.