Characteristics of the study population that interrupted NNRTI-based ART in SMART, according to the interruption modality.^a

aPatients interrupted ART by simultaneously interrupting all drugs, continuing the nucleos(t)ide reverse transcriptase inhibitors (NRTIs) for a short period, or switching to a ritonavir-boosted protease inhibitor for a short period, referred to as simultaneous, staggered and switched interruption respectively. bIn 46 patients the viral load was measured by assays with a lower limit of quantification of either 75 or 400 copies/ml and results were “undetectable” below these cut-offs; 19 patients showed a viral load between 50 and 400 copies/ml. NNRTI = non-nucleoside reverse transcriptase inhibitor; ART = antiretroviral therapy; MSM = Men who have sex with men; IQR = interquartile range.