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Persistence (i.e., time to discontinuation) by type of index ARV regimen (NNRTI-based or PI-based). The difference in time to discontinuation between PI- and NNRTI-based regimens was p < 0.0001 (log-rank test); ARV, antiretroviral; NNRTI, nonnucleoside reverse transcriptase inhibitor; PI, protease inhibitor.
